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 0x20aacbbe7b1ffb1f14527cb94b3d658f44da2e3f6bc7a323a120891e45254765. 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/0e9f5bc9-e98e-4207-8724-3b9b17c8a77e.json and https://artists.proofprofile.net/proofs/artist/0e9f5bc9-e98e-4207-8724-3b9b17c8a77e.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 0xef7b80f3aad4829c5c0e60515f801d2bf59de8136d51f647ea73ce0b2ce2b5cc. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/SE5BU2315909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd633d9b49617eacd79a4b07efde261e3c210608189990e4181cfd24ecedfba0. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:25:01Z), 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/SE5BU2383115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba32a1c68a9bfd8fe630aa588cc294b49977bf4ffde3ec394580bc931a7d83c5. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SE6I32392145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594262c9fc74df43114fa12df45c8806095ca1635e37f403a4597a8ea1e22134. 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/SE6TI2386505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d07e0e33a7f56b4eb04511c6c8a8914f564b0a4a71fa0fed16e1ef0fcdae15. 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/GBWUL2498459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fbfd56cff84da4cd70b303e27f22fd711a80448cc12c1d1bf4241c89dcd9c9. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T10:30:33Z), 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/QZNWW2484757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8693257fa60d9a3d0e902b5e6c6c924da67d30703e15f1ef9e9e32496554062. 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/QZTBA2489033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda85ff58d5a2b3511420c5b72e974b72285268ecf9d5b479e99ee2a719dc00e1. 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/QZFYY2523798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1ae86d27e3200f4c918a6ff4734008951ccd9c6a1d07f46648eaa8c3fc9696. 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/QZDA62588169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1ae86d27e3200f4c918a6ff4734008951ccd9c6a1d07f46648eaa8c3fc9696. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZDA62588169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85333ea9ea43273a9b088f40db3488636504e0c22f77cf9eec9d578de272c273. 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/QZES52503983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53868a8938a6213925462b4f8f6d5e4fef7906232ca71dd0437c7aa568a7c55. 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/QZES52503985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acace06b2a94d718bb70abd903506a09b501d01ad48757b409d331a29dc19e6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZES52503986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c65d8d8f440df7121e8b51e59cdd08b3d00a63b7d5b453dd8c7b1e65407454. 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/QZES52503988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59091e7f3db77194ce854c5de46440796dbe6b1976ce4573406746b44fa6dc7. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZES92502128.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36930be44125185cec2a5a8f274c880d891e95847498f029dda602356a3413e. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZTAZ2574711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ba9988d74f4cbf905fdb622832b379bf889cef12c910efb36a6a2c27f6cf6d. 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/QZWFH2585162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f818f3db6533db2f190a0d7168abc20623a9d70dae2519699ac5cedc762d5e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFK2595595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f32300fca9dbbc7ec1ba45d71f251d5258d2912567437dd79a7e295b50f26cb. 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/QZWFN2542220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f504257c440d864fc4c1b689aeaabb524002baece9c6f11ea26818847a1687. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZZ7V2523533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44accb2670c015a20f56c2c7def76bf5ca127289fa035916e693ef7097677210. 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/QT3F52567559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f68cc1fc986a2cba65c0f279ae945704e2818ab9a5f2d5be9cf038b8a6c636. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT3FD2571041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2358b6ef2a678cb6af75171851b85d233ed2acd383b04dd9fd6588d8609646aa. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:49:43Z), 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/QT3FE2548381.