1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24037ec3949f42a3c725572b5261375f49a10652c63771a7e2092e044df9894. Chain 2 (Bitcoin): anchored in block 953667 (2026-06-14T17:49:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5706f16b-8863-4450-88d1-513e33836412.json and https://artists.proofprofile.net/proofs/artist/5706f16b-8863-4450-88d1-513e33836412.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806e36b7c0537f3aa8d6e0ae4b872af2d51b640bbd85a90d6eaa1e67dfabe5f5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES17D2402303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526270c505195ade017a17b2ae92e5d9957b285cc90cb6830328fcbdbe75d219. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5951404673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376b101438654c5b0b62e949144a8c32007c2b15e74a31b3850ac6eb91c86aad. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5951404674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69875cc6e8a6280c59bda9405d0e815d1a12739ba94c9afffb8b43bd1ad9c225. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5950702437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01c3bab1dcb2e3cf71fdaaa716dc7f2dd6acdaf647fb672ad76284cb1d3014a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5950702310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfd7af04b03edb36ff13a3c48c4f6f3a5f387a8dc20db0faf3c795ee5f8433b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5950201205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40fe21bbec21cd8bb25db80cc0f51e8c20fda266d0cc8a3cbc22b1915a90f43. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5950301317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86e5981e9ec53c50ff6d9b2baa5317c0239a815b75ca024f931bd7ef1d77d9b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5950301330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8961a65727f3b57c163258404afd8772de7d2cd37a9801fa9bec4caea3e6013b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES80A1404002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5756bbb03b3c1d43421237d9eab0638901394e69c71bc122dcfadccf6f836f48. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES80A1404005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d39b5d44c7d1915a2b5f7a3db0ca17c5463e7aca3c75f9dabf2236d65f99ff. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES80A1404009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7608163b0ca47d425eae02b18b03cef8601a13b9e681ff91cb0d6d403502ac8b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5021701680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a97aa7fa93788fd49d10acffc7f407ea8c467e8594dc5c5da4f7b097e14be7b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5021701681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9110eb4d540ab699f5e2395303e1312a9df91b591e2671a5b7f0a4ffc9a99a2b. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5021701682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466f3e5a066e98d466790442223253565c7ccc19d28be2f202f46da9b6d6a6b5. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5021701683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2aaa66225f1628c4182331f993f80fbd213bd0716f08c2e9b303a6e237daa9. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5952006345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cec0bc565d67f6e647dbb3518831d63bf59e6c3a3b46e1b4e36fea99c7b2a67. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5952006349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d44521b55a7a73a1c5ad5f0f4c24f2393c8b666e71867b0605551d504f46904. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5951204194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64260b9f9f2d9be02a3fe460fce6066704358621bdbf5152db6bbb562195eceb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5950200914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81758cb735d56e2a6b5790412a1f660a0fd8710182710cbd9f96b8109908a4a3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5950200915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5aad878a82dfd7aeb09ba1eea4fdedf0a3861650a89a745f558d75cd8c966a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5950200916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07645af08015bbca5cff2b3a81684b8245114cec62385106e659c3150716d3b. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5950200917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61b5c87fe3444e1cd3c76afdf57138995b2bc4a2a3815b5ae8e36957c9cf5d8. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5950200918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbab8b01422e2303731ebe1c3fff568094e780eabbaefce4c03b4e4264499d7. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5950200919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370d87d5d79d785f91000539119fd7ee7440727866fde94510ef99802c6d6b87. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5950200921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a66876be3883cfb278c07d4b8c60d8c2ba3fec0e4b77ea82ee1ba046b4b14fb. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5950200923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afff97b54f2af8a2a6adced631da9c285a47796cb3f2f74ed29bb8f50588b7c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5950200924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8545806408cd5c55aa511ae444fabf3a0d3e62f541165bbc5a4385568e82373e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5950200925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e03b34ec9cc07e3bf4983538f9d23139d7a3e56f43f8fde55fda4f26589f67. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5950200927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cf5c4a6667eaec9ffa429b22c70f83c5c94c6e903f26253f7ec86e34849721. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES80A1303805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64260b9f9f2d9be02a3fe460fce6066704358621bdbf5152db6bbb562195eceb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5950200914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64260b9f9f2d9be02a3fe460fce6066704358621bdbf5152db6bbb562195eceb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5950200914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b6152d6cc219b2f48df531b747b3ad139f8001f93ba261301af9aad6142422. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5950501810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294407e3509809cfc81581e7fb024fd7386d4b41c77bffe5e6dc287b9b4a2477. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5951304567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8450db0647e55808856bffdda0d1f357c246375a39d855dbcb9f9c1962d86c87. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5950702452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0854d009ad5e54162ad0589117b427e474123af90c6e4c8ffac2eb9958515196. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5951504936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840f1f559965e2eed837d076b7aac8e52515c6eb1ab7aba2640cd3d4162aa67f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5951505034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d6f0c435c7d5461b90b3980e326c82ad8e411334bac1d30809423a78e63472. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5950201204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b93d5ad96bcbeb5f5dae623d3b7bcbbff8874363f06a873229365947599f4d. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5950201207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9bc197b061de846de4e73cef7342d2ecae3702c6bdefbd805739a5d5036bc5f. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5950201208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8720896b2dc7e1f82c5999bd35004961780488b4dad6ea28a58063d35a2b95. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5950201210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573897f7807b44072bc16d296a5f8e08b158a48e29f697b1dfff61339dd63cfb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5950201213.