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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0931343bfc348d1a3f6a3d40e8a85a384971b26a157115b9a939b1eeb76f5b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b96adf23-774c-4ca7-9e21-5624b8871a6e.json and https://artists.proofprofile.net/proofs/artist/b96adf23-774c-4ca7-9e21-5624b8871a6e.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38533874f4e7ccce2bc014b551e6ea0ba0cd80641faf8117a831058b1b925d2e. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZTAX2486721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f8ae498a34a334d30c6536158b2d9d270b96316f8ac024b947db1d2fda5d70. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZTAX2486722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d4a459395c8344e4a1b4729ada41c80348c41798cc055964990a4a20935d7a. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZTAX2486724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7961172bf202198b19a6d0a47e17db6dce36f739fa31c003c114f4745247fbe4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTAZ2450310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942a28d073caa11f3968cd84a0b8e339cb6f8946bd5cd353045fcd33cf4e6a39. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/USANG2158516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9058ca487fe88981fa24d84b0929804f6422a37e2724d17851236f3de2d2f79f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USANG2158517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f553afc21139c64df83309a451ce6b4ce0b86ddf3fb9b34220777151e77f791. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTAZ2457052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb768ce9b5ea711eac5d0dad79d4c2cd30d7b99dc2a7318e4cf03690b16c1eb9. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZTB32418495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a158862d12b010069437526cc375f60dd9541bf06e81150334f6bd155ef836c. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZTBD2416102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7e1870d19c4aacbc1582f9b0f24205802ba2e144777be344d0fa676e46c6f6. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZWFF2421914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa429b1828d4e1cc707b702462501490f4180ee7af4e47169cda607324a116102. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFF2421916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e84f50c8da239ce4b9b371ec2d8134d735d591d6f557fdd808d5610a124b12. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZWFF2421919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b7ad18f74a19099abf57629ea068510253be770c40bec4079549e68ffca671. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTB92537930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2751ca2c85668d70c11915a29fe0c0c30b5d21fbf5df420618b2fb54c51276e2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB92537931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09f8103983d9cc0022673588283b26d019393f7053aab96394e0333a579e2fb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTB92537933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c975590f6580f210486cbe89e3984d6a618e2c40185bfcf1be24d601f7d22a6. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZTB92537934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b77d82df680e8c80dc95d8f316ffb04c1ca16b529a203c586ec97006ce2a820. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZTBF2528532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273e8d64e7debffc0e9bff3f24a484ff0c837fadb9eee8b05e2affa9e12a5836. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTBF2528533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbfc805e439917d859cf23af6fbe92a3166f4c229fa2e0b963322f51a233046. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:46:09Z), 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/QZTBF2528535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb617f2b667c0f3d7d286b821e3db4f6b47b213e13850388327138c9f9a0d7b14. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTBF2528536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa11bbd49f1ecbf98b6a8c45c3aabb26d400d00711d22ffae26e83565d7f65c6. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTBF2528538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fcd66688a375fa94ca24dc371a7c17c49f8f704ac427c8639d6256c8073360. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTBF2528539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4628515f6d57a222d1548047888b3c0578b30f26bc73b388415e987e226c77c. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZTBF2528540.