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 0x00d9b01007cc7930085574795c026443f4184a52f7599d7c84a9abfec6875e04. 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/271afa39-2d3b-41af-8cf3-1ab0931e4696.json and https://artists.proofprofile.net/proofs/artist/271afa39-2d3b-41af-8cf3-1ab0931e4696.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 0x61c31cf2fc667a947360a5d0e42d2541a4324b594b7381884b20c51a3a988cb9. 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/CAE561228006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc483e1b584cf861229cd588f64ab05d340133f36bc4663e32302c2a6a50515e5. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/CAE561661002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f7ecc157bc6639b266ef24677f9c1c65ff6c0a3864f66c9d58396b2fd32051. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/CAE561661008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedd6a99ea556158a135442a8a6131245270b66cb14aa6bd91ba8a0b05ce6aab. 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/CAE561661012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c81da723852b47ec512b591032e1dacb0f9846e8fef3e1d6100c51996dc8c1. Chain 2 (Bitcoin): anchored in block 957714 (2026-07-12T14:35:57Z), 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/CAE562016501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9095e5d3aa935aa7c4b3e4bb7e27da6ec43d1fe96a6687863328136b9eace18d. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/CAE562016502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2999e5be6059f441dd52b596f3e546ea790c492f689bc9a9e58bb7d1af6877. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/CAE562016503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067e19397a41faa31ab923182e6a836e57992bb8d4e895d34ed687223bf789be. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:20:54Z), 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/CAE562016504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead904fcef4ceb8f138972534b41411cfd274267f16f030b70dcbc2cf5df25f3. 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/CAE562016509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6792287ef3b156f0785c51eee08e4981ecb1c0f800f0a01062890bbf5dee23. 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/CAE562016510.
Toutes les fois qu'tu t'en vas loin (Everytime You Go Away)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a6a6754e196f8861c56ad282e25fd5e21c599d24298605821de3ffb9e06ef7. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/CAE562431301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ce31b1b181e7889296e4a3a11478a9d4dc44a91e500a5110b1025de273ab06. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:57:12Z), 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/CAE562431302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c1c47749e1a6cee8b809dc762c616b77a48637fd7fa51ab12ce4928337a81a. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/CAE562431304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3559fbc1c201d3eebbe368e5a38363b543304b0f412504ce2448dbadee876d. 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/CAE562431305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf048626b8c143d421b96747689e8f8140d9160813cfd4924242bee71d8e89f. 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/CAE562431306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef775257b0bd46c8310168d198374924c004b3bbd9ef0abaadea67c67f1c69e. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/CAE562431308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35321e7e53ffb79649c43c6ecbaa65b3bc65ecc151022b23ea50169de200003. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/CAE561610912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c42e01fbddc9f246455eca749bdf99071179596fe06d1b8b0e268cae2e57e79. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CAE562125703.