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 0xaa76036ca74e57b1b816df97dddbc7df9b1d2066383bf58058037daac210b1e4. 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/1808d370-1093-4642-8af4-945cd185ff84.json and https://artists.proofprofile.net/proofs/artist/1808d370-1093-4642-8af4-945cd185ff84.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 0x9d72b5bb557d61bd79287b0c945f6c33e5862615919f45b4641dabd5329d72bd. 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/GBLFP2034652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66aa14e3ff421137329bab704da9ae11654339d25d766fada167a5f703e11fe. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/DEAR42351093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac35a6fa6a50787cc2afb81b709598f1a4e667568611e478442f8c168f2f00e8. 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/DEAR42368570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9286c2915d15fa5bfa75ae92763f683fabfb025004fa9b8c397413fa5809153f. 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/DEAR42315247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5ece3e8a3a0832caf06c676ef123dbfbacbb8f12e760ce3db3349f7f1f48dc. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/US83Z2410518.
Whisper in the Dark (Diego Narvaez Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838240b473f2f44fe2f23c89587b7a317c2cb43ec7645dc7bada411f1bcabdb8. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DE1O62456415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9282ea3b8b1897e42c93127523f23714c97c42c46eec3277f75cb68d31d8476c. 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/DEAR42577828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e6c8b1033021f632309b89f5746feb2b4b781f8f5f0fe39c0817c011855ced. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/DEAR42546617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8cce6a09f58c7ed39f62c8c722d96bb25edb088d975f1e919ffef65a787592. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEAR42536887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1204acc9267ad3716d91fac48e0811baf7e927a52190d02b7df036f274afc79. 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/DEAR42525678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e7f1c30474090e16b758571acd55b7bffac83853ae5398a3f17cb16c129d30. 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/DEAR42525543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe23c2cc9c199e334ac8ce137e586c9b4a58bc390bb0bbde94f5b2d6a5a1c0a7. 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/DEAR42525591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523e3ab30b48bbb5ba7c4f537461ac069f8ca434b86a482b2320e71116bfa8ec. 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/DEAR42541814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443df9af11e63b23f91906e47771f864af299a7a8b22427b5cf52480b197fa0a. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/DEAR42518574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad33f9275d4eb773612f68bcf1f3c348d11289f80ad9dcfb9760c8c2ced1bfc. 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/DEAR42514992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa9901ebf6ed4bdca5b4aabc27c423f850d07611f462768e93c82bd4685518c. 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/GBLV62311570.
Les Disques Du Bord de L'eau (Winter 2023)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcdc024eb049590b9544ce1b2c57d823aa023c3aae4574503f829f36ea0ee48a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CHF252300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef006f4c8e8d13ab9a5cff4c76cda12e3c3991799753f942a0b56dfac44f75f. 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/DEAR42338682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b256f3abe6dc0be982a4503f82d823388bc54baac35c6328629af8845fde23. 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/QZGLM2498544.