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 0x0b5a799780034073e72d2d569179fe320c21e43471cde6229327ba4b2a6f2bd8. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc9d9cc1-01a7-4879-98b2-aa2066eb7781.json and https://artists.proofprofile.net/proofs/artist/cc9d9cc1-01a7-4879-98b2-aa2066eb7781.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 0xc2bae0df899397ca09ea0dff0feb5b3114bc6c1d9b4ff15b35f01f9b53c760c5. 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/AUMUO8700048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75431b3efe7bb7e4ebb22f835bd0811a4b85362bbb1da0d41814ff05a3b65984. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/AUMUO8700050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4233fc524d6c1feaafe0c1c8d39f24396e5e87d536a631b1859d2dcce0adacd1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AUMUO8700053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332a8bdce2cd69e8fd2088a3d130ee549cfebfef2eea7585d1e583526cba77ee. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:54:18Z), 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/AUMUO8700054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedcb677bccc418dd11c21b532c63b2b81982b60f76052ba70287acdd1dd68408. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:46:11Z), 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/AUMUO8700055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2025aa24587790c7ca38df0faf5c09324a1c9d5d552e4926bd1dc2f784fce8b. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:11:02Z), 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/AUMUO8700056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf416f8327b9c45c4437aa83404043df35242507d1868a88b904a245d529c316. 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/AUMUO8700057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656723f6b9cca3423f136d5eb34cd04b758ceb930dc1700ceba5937437e961e0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AUMUO8700059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839945fc7704a3b30f5bb504ed3c915ca4097566ac0b23f72c7ede9d46e65f2e. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/AUMUO8700060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3fee037fefb01ea257fde6d30cdfda1769ef3f69302b4e76697119f4cc443e. 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/NZFN08900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544929dff86ddca83b8b366e07fae66f6df49fc5aa2a2cb8b7a401c1f37d08d1. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:12:32Z), 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/NZFN08900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb428181f56f5448bf6bb66b56f46d8b620247d5ad34687f91979be11e2704d42. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NZFN08700051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28756eeb281dd2de64f2d2ddc842732f30f30a5a7b2c8f35c8c0780eb1c933fa. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:36:23Z), 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/NZFN08700052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7486dd699b30d05dced4d7e47f0c5f6cfe2874e4a70e8e3599f80b223b4dcc55. 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/NZFN08700053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8457fbd60182d0228f60b25f81780bf83b5ebb4b08a4784f10cb214124b3c84d. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:07:45Z), 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/NZFN08700054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f47136f22a79717c91e4314a017df6964a95cfc4c25e35c701cedd713be711c. 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/NZFN08700055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a22ae245f85dd7ba011232471ff79a5a5230b95ae19f9c5248911870434157e. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/NZFN08700056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a50146fe24a80d43f1a6dcdc96940c4c8ce59683cb69d8c51d3da830b34378. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/NZFN08700058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1f153ee24bb4c01ca77dbc538ee908da4db495ad94bacc045b89818de4dc5e. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/NZFN08700061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc978a29dbcb05b861b3db13fb7dcb07299a7621998b29f9dac6873799536241c. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/NZFN08700062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b139163604e82ffb00f5223caca7a35a31d9a5104a6e7b98ca7261632541ac6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NZFN08700066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e3812392302dd020277560fb5fd3ce0737ed180ef95e88533281f5e183a5c2. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/AUMUO8900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044c6aad2d939b632d03265a7ba9555eeb3f9808ba36df93f94e8d8efa21efa7. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:06:58Z), 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/NZFN09000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410c73ced73c0a45ed728d966509cc1ba1e0e688a57387578c418eec22c4b856. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:20:16Z), 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/NZFN09000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b2f400fca3ad3804177c7536311defd3443b1895507a100b3513701a271a70. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:39:31Z), 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/NZFN09000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f220f9c58b36319118d2cf862ba5ea05de9b4a45cd069646a5b8f92c235fc0. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/GBBTF9200208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a5c3d06affd2fe82954a00d203e27a24fc2ddaa09adc7f32150feb609df9d9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USMA21020436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6369d8c31f85b524e727672e7e887775fc061fc99fa2cb10f31b59e74f6c5a5. 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/NZFN01100009.