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 0xe4406a2b3ba6c8ee8e098e86b013035a227bacf77736b928abaaff87d8b4d1c4. 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/ba8608e7-e8b3-48c0-ab5e-6361b446e502.json and https://artists.proofprofile.net/proofs/artist/ba8608e7-e8b3-48c0-ab5e-6361b446e502.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
sevensummers - international pop volume two
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 0x6e8a825e2f54cb48c0284c84a0320cd0b90211574a0cd30f7f980c5d3f9b2402. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US25T9810878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d40ee93cbbede70c5d64574753ea70aeee75c735bcebd888eb2122b22151b18. 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/US25T9810962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda505981f88b4012c4832e6879614af1b893e8c736190514b7d3fed30fad817. 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/US25T9810971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc430179a6eaaa67a43cf438b50c119203018726c12004f2f8d787609a64b1306. 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/US25T9810960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adacaf75ac90d5202e60945f900f0bfd94e0efa4fe81056869f60449050b9b1. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/US25T9810970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf38e109e57229524033693d08ad77cd74e2c92e7c7f8658bd102cfe3db7143c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US25T9810969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a769f8369195698a2f0ef5946c7777dc5a9df245bab6558a1e539b4410b4f8a. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/US25T9810958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c1a646320b80eb2c90070d9e1429c29aa6ac97b6d2091fbfcfb5b36ab8cebd. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/US25T9810957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c36e1cfaf69983547eedf4b2a5bd5fd66c7c189d6dbaaf0d830f69673ffc173. 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/US25T9810955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a0c045ff9c1b9ce87df225df3adb40a3bcda9023f6ef3863056957ac149ab2. 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/US25T9810951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ae6dd1b5b6a81231317b98198399c074899ec6468b5659ad7efbba3913a8b8. 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/US25T9810963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d58e969e825ab06f728d2491586c7a783e0402e1ad53468c959c8309d7d95e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEHD99811301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed83aed2969a7c5f8d2fb5b6e2f7d01ee53fd5bdb569cebec03aa643123cdb15. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEHD99811302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedca42aad4ab2b7bb61a4fcfb13d1358ed3dddff1dd31d2a2b17900a87a97d5a. 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/DEHD99811303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a33aae9dfaf34027cb7e257fa74b36b1ccae70e8200fcae22d4a84c3d7170e. 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/DEHD99811305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac2580da13fa040fb5a8862c6bae4817c2264ad70b13e9ccd0d273927b942da. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/DEHD99811314.