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 0x09dd1e0f6ef71b4688ac53989fda9d35e78c474bc07bdc8367bd9f0e4732a0ab. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca0b2da9-d79a-42aa-bdde-9a97ebd1d317.json and https://artists.proofprofile.net/proofs/artist/ca0b2da9-d79a-42aa-bdde-9a97ebd1d317.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7f7e26f752597df45247f9d186a52092f04962df8ada78a4b016187d7db84f. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/GBRKQ2482504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea876126ea46124bfdec51f684983b9422dfe9b66f30fae841c7c4be644549d7. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/GBRKQ2482509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99bef11f27a1c11440fd2bddac4dd7347afb0e1b87e30a2e878f1f43a9f61d00. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GBRKQ2482510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31887ecdd1f43cf3196bcce8e2a103b30439b59d293aeb53bd3cbee37104580b. 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/GBRKQ2482512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe3669e39aca7d8ff7d784ea582afe283ff391c6e7b95e8c121e3da5bce6639. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/GBRKQ2482517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7282501b8bca18ae0278a94683a67df638b64de87b9e4d4dfeb536b03251e3c. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/GBRKQ2482557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f02352baac524805bf42342cab1ef14fce9f7b81f6e9984936fbcfd85ddc35. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/GBRKQ2482558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67122dd3d0ff2b96fb5ca4a3f595e30f55c6ccd725543740de5c4e09bc2ed9fd. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GBRKQ2482559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2d8392a761dcb0a8bfd58f924dc8bafb8e3a477ea92eccfb0c605ed39e21bb. 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/GBRKQ2482560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf82f82aa025eb8c6f9a45680d20606d18ee5f509cfff544eba51c3cb3dcaac. 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/GBRKQ2482561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c8154f05246442eed7f4cdcac5ecc9086a4cb983b8d46d03a1ab4f103a148a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:25:14Z), 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/GBWUL2403915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd74dbb34484baaa4f4c4470992782b86ba6b33be67bfd1b6e600c96b431a2a. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/GBWUL2403929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf923a7f12b1017652f211dee233d7cc9597f3ea697ab685df73be42ca2427c. 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/GBWUL2403930.