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 0x34797be8aa51f64edb0f8821e7a9755cde4bcb2299e0196b36eb2e806eed8159. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b90dab3d-8dce-4ae7-8db6-189c46588cc6.json and https://artists.proofprofile.net/proofs/artist/b90dab3d-8dce-4ae7-8db6-189c46588cc6.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 0x95b7d97085c0c7414f28e7392e7662cd9f03db39592019418c0b19fdf72cee5f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBSMU5762880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78073ed7d0abf84ca18711a2ac4dd59be9718a3068c7766398da5a308dacf045. 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/GBSMU5762881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745104ed3d020703e61a4a8b0fccc25a4a74b940a26bd8a78307fe78aecf60bb. 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/GBSMU5762882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7b8508e31f900a7b0e7170d9afebc9520c2617d5f1ff231dd6264aa093ec2d. 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/GBSMU5762883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee29bff3455f70003d9320aba5444f4449da00d73b403b85141df0253bd1df0. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBSMU5762884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9cf5b81a0056756d1c1c0d221b8fbbb5dce1ebdf1658283cf3103bdc6d7258c. 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/GBSMU5762885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b38acda75c43f15053831062412c0e6d2cbbd96e65bc9d1511f60819caf8866. 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/GBSMU5762886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5fc37e11d7ad11dcbd6022d2868a38ce8f8ac33901b8f77a16e5c29389478f. 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/GBSMU5762887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66badb5010ad3abd2b76e3a241acdb55b8a0d936251435f01683f1c92814b00. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBSMU5762888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3f2602394510414978635a4843698ed8a28d4d16a5fcee52e3da6eb88d8beb. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/GBSMU5762889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c77e3fa90f400e54a60d69935be4e38f08a04f1c2c6fe3443340b58b689d49. 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/GBSMU5762890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062849f533a04ab9aaf9a98004611f3b8ead28375c29779f743c14867dd71394. 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/GBSMU5772890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadc1b6395bf6868ca39449d4c0cbab12f187638fcb1334af0f41b4e91fa735c. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBSMU5772891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ef108233a97e62fcbee910f7567b652305de4553ce44dc97278c1fd023a284. 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/GBSMU5772892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdddee7140ee8ef8fc1b709499a5fe209f906e26158a09a1d21f08398c38fb63. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/GBSMU5772893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83066f5d9478f93eaf773865381abe17b6bfba316c8e148e39f2a29f74ea0387. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/GBSMU5772895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24b31c73f743fda8dd4cb9967d738691d1eee38ccb6b31b6a6c2b52764aa8f4. 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/QZHN32347525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83b93766159653a3df820ac4576dd6882b2e83ebd48fadd65021d727acce196. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZHN32347526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42e490067adbe1f4de9f6cf54c16f1131d1b4b443ae7c5446aea2d0e325e285. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHN32347528.