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 0xa60f88c562d0d571ca64bbf5cb7765caaedec1865fe84bcde949d21e67752f59. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/748d3b0e-79f6-401e-8414-a5f2f97a2142.json and https://artists.proofprofile.net/proofs/artist/748d3b0e-79f6-401e-8414-a5f2f97a2142.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 0x40eab9cdfa8bc552f7e94495319f33e18aa4fd2c3e1238834f9bfc47a9186889. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GRL010900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446cc3c164cd7724234eabe9c154c605c73b02b64ad8b9a55b96c28dcd48d308. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/GRFM19400388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0664f707abbf058637c7187615e23e1c2e5d8d09391d9950327152489605d6. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/GRFM19400369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ed454ae31f45badd92f459362b4c6692760dd1404caddb6869d0623d85ea06. 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/GRFM19400379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48eb8a265a1d486feecdbee100c349ac7c7039e881287c2e942f748885dbef3a. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/GRFM19400382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318e83889f9225d119e32dc2b23cd92841ebc95519f9586e907a9847898e6f6e. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/GRL010800077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb5afd1082f95a706b004696285ddcae58d68ee3fbdba3ba63208834338b080. 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/GRL016700036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c01ff9a85010ea1b826740d2e5a8ee9f4bf193ea8c49245018cd61662f35911. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/GRL010900057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad9754414dd50f471905517a561e2576136beae754f12c6afa479a8d59eb870. 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/GRL019600051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc62ccddea8db11b544981b21ecc8525545d9c25342262e695099281c6ef7f5b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GRL010800297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1d6a99c2b1b995b8949eb4ab3d96314a29bcf8fe0f78238be9e4a2cf9ff616. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GRL010900907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c20ca4d9eb5e9afbb839f8f70779a94d8d531b8aa328bbe17f653bc7a80df62. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/GRL016400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcebb71809e5eef3bcd487f345d21a0f29e016627479d20edb6bf2f179db557. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/GRL010800078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21f56597009386a0ae46ed2cc20cfac29e5964ccdc96339fe14a797a920e30d. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GRL018800107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92dd2779f611c89462f07b733e7bee885f4f4c67d8e05dbbe958b2ccf445aab. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GRL016500075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973831b68270340eada242fc9a0190c37e6e5aeea3b168dded349f8ae1eb2203. 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/GRL016500018.