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 0x4b2cae0db61964ed542c70bc4303c7b0ad384493543de9e84e17005e0e191958. 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/e8e10504-feac-45ee-9773-dbb46607667e.json and https://artists.proofprofile.net/proofs/artist/e8e10504-feac-45ee-9773-dbb46607667e.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 0x8b1cf609bc520e53a1bddd82d4bf9355c454b5e62d62b5a706506fbcf54588f8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZES62253776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5c828020c437905028048c47a548de96d16f28e96481e792167f52c9a0ca06. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN62261904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe262f935eafc5e932d6075cb70a4a597223b5760c1295d66e835770579b8ddc. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QZRP42269308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371c878a44e8dbfa846ff29731e65e29d349c9012446838166f56fa2256428e5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZES72333125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2097c4d49f35246f838a667b0be8726b1da2b07cb72b17ca2849872872c681a0. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZHN32328046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36412d73a9e29e6d0957059c2f1ffa0c45a36ffaa975c838686dc35aac2c9580. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/QZMEP2349980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5a3318caf14647240ae22e32712aa35e284c9ab2f96c4171c84ca9dfe25f17. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZNWT2317897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36412d73a9e29e6d0957059c2f1ffa0c45a36ffaa975c838686dc35aac2c9580. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZMEP2349980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d762d88a379191d5c68f8daf776f257b7931e23b4cac11f2d2a5b884401d3b0. 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/QZFYZ2437302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc986fc7f8645d51e037579989e477c51d82e79a336350ad71455ebe60422de04. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/QZDA42495282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf727ab5ada28675dd3e1112df5e1c34babaa707c6460d7538a6ebe1279fe90ed. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZDA42495284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ed5a3716fa52a00abd299c490b8e070332d64d4a9dcc420b097796150596b5. 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/QZDA42495287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc986fc7f8645d51e037579989e477c51d82e79a336350ad71455ebe60422de04. 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/QZDA42495282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d762d88a379191d5c68f8daf776f257b7931e23b4cac11f2d2a5b884401d3b0. 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/QZFYZ2437302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72717526bd704dbe10218dfca75b608b6b1acd063e43ea393418b2e7a6d5f86b. 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/QZDA42495283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf727ab5ada28675dd3e1112df5e1c34babaa707c6460d7538a6ebe1279fe90ed. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZDA42495284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea43f2c0f2a115deed7daea236ab5a4bcd66f5fbb2d6e8dbe03f4403eb9b86b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA42495285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e54b164ae3d25dfaaeaa14d809134ed803992a88ff75338543aa75bce321f93. 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/QZDA42495286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ed5a3716fa52a00abd299c490b8e070332d64d4a9dcc420b097796150596b5. 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/QZDA42495287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127e1c29e9778277ab2510cd15eb4304e4a4102590078d480e40340c94732e26. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/FR9W12553698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573d480f52c22b7ebb7b68d4b3c0f69d1bb9ac40c007e400cd6e704fc3908328. 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/TCAID2467516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573d480f52c22b7ebb7b68d4b3c0f69d1bb9ac40c007e400cd6e704fc3908328. 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/TCAID2467516.