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 0x14609ec77136d072c6fa2d117511bcaa246d4ea042eaf12086dab667bef3f78e. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/69667a36-391a-46f0-9a56-5f20bf0ce79e.json and https://artists.proofprofile.net/proofs/artist/69667a36-391a-46f0-9a56-5f20bf0ce79e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Notre Dame de Paris 2017 (Live au Palais des Congrès)
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 0x35cac5bc5e95d0b0af9af495497ff772dba16d9c758c94f7110444bcb7c22a94. 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/FR20F1600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bd8526e788117101adf0e4af3d9485d7ecb16aded06d6438973cd0c172650b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR20F1600090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29460e3c07f06151b7b0cf50091e8f5cd21fb97eea2f3751cf58723cc96705b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FR20F1600160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272ae27b388427e987e6142204d637bea506910177c75f9b27607d6c56f5cbae. 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/FR20F1600290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327b7d9f24a123303cd818821cf4d9ec7cd34584390d224e4a4a648c24d35927. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR20F1600310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fb46e4844c5c3e615825dfa2141d4eb4647fb39dba2a915134642c24e14186. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/FR20F1600320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62faff094f5705b26f52bc195f1454967108cc434493142ac4734530f1e992a9. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FR20F1600430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed78afcbb7ea0b9e40570239e03cfb9f9cc19f8ead36d33beb1e10b9bf5987d. 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/FR20F1600440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08bf21f012100b477678975b11b1c5374332547b65dbf4359c78fc48ef5dd39b. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/FR20F1600130.
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 0x6ee085e08d981c48b2774e8e16106f7885fbbad00e7fe68f12da3dae28e6b181. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FR20F1600270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657efd639f99c760fa225df8c6d4c4d6402e5129b490e403a8190cdf9f36205e. 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/FR20F1600140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83cf06614059be066a5e89144dbfa44666765ddbd6a3030be9fbef764c7c1661. 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/FR20F1600150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16b06be53b7cf8cbe989b7f09ce104552e2ec07fb95616c0d94f4e5705bea4e. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/FR20F1600190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7c8cbab4cd1373925e34f80faf035c5f6658f29fd20760b2b2b85a5a62c399. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/FR20F1600300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0990190a27f8c44e939d2f16f00703c20ea2096a140c9bb69b63a02b2984105b. Chain 2 (Bitcoin): anchored in block 960101 (2026-07-29T11:46:30Z), 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/FR20F1600480.