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 0x5ced30fd190c376fbf552df03171f3b2893772f4ac09d8e37703ab59d05aae2c. 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/268a5a71-2e9a-4d13-8515-1947856065e8.json and https://artists.proofprofile.net/proofs/artist/268a5a71-2e9a-4d13-8515-1947856065e8.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 0x367e782d8875761e3208cbb771eb17621030cebb2fcff11dd4e5442185ffa9e3. 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/AUBEC2310414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce6b02df2f4dbb71ee9914f983499657675f1d5863e7cb43f4e3b713760a196. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/AUBEC2313382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795c421f3a1d6985308296dfb62d0bac1575fa27c1cb9d2d72020c21ec2499a6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/AUBEC2184277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8f2fccd22acda7fc89cde4379d51c04e4e20189f8619afeb3debafc395c973. 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/AUBEC1925014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30837b70a855acd002bac4a0fd702409f9f5e196806a68a95372bf960e56db4b. 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/AUBEC1914409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430050ea92a075ab8af0b56b61050ed0541110403613d02cfe3d71a5704a9ed1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/AUBEC1908896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4184f21eb349b7f115ee795795ccc3a990652c8f19816c79a6950ad9f7f15f. 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/DECE71800080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e303965b14a23adf5c5f462bec21bb7d3e633505109a3dfb0c7e3da3e4d9b8a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEUM71704108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d0fa140bdeee1168d44abe2d702d08641526b3f6f70b5cbf6319b8bd94dfcb. 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/TRUM71600037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc732ee48521290d2e0fd4cddfae1591d1b94c9a719953935e4636d7b96fb6efd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TRUM71600025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee88b0d0f1b7b057b09814a9e9907f5bab8faf16d05f0b9057cca9df4c6bd188. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TRUM71600026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d59782445c1c57a584eafb679928b5ff148a547a40d1411bcc448444c330b0. 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/TRUM71500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacfe1a93f1788d455f7be1d467306f30a872f4646fcb4056447420232346fd8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRX762573207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfffa87d15eb1e87ef56bff3b46db5b5541d9a80b489d4a189abf03928e2a1c90. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX452566218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdf41092d588efcb1550062b38bd590cd40ca763c04df27052a48734094460b. 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/TCABQ1345289.