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 0xddbc5adc5756cc4a7911a25b06255584536f61806b784b31fede18f1cd1db153. Chain 2 (Bitcoin): anchored in block 953903 (2026-06-16T07:05:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/14948e7a-2b09-4166-a406-f4e56823ea18.json and https://artists.proofprofile.net/proofs/artist/14948e7a-2b09-4166-a406-f4e56823ea18.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 0x19b50c49e872065a3e733880935b6ce522e35293c1b8d268f5f3cfe5fc7df1de. 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/GBLFP1576831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bf626900436a2d26427d551b7b1369c794aaa53f538454e4bb91402192d18c. 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/GBLFP1576835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1b1830701ca6fee265b9acb95ae85c8c40400bf0146a52a0de17de955693ce. 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/GBLFP1576832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0121dcd2a2d4118d1718417b8f568ee070fd5b5b024c041733c3ebc301181135. 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/GBLFP1576837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa969eaa27e7ba8d0e2da669b3197d68bb9a422630815e394653523cb9b03e734. 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/GBLFP1576838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9819e4129ce126ea6e3ca73d0b9003a0cbdde7caae6b0443ece3720c139aa68e. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GBLFP1576862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5615f149f183b7c46437f98e04ad79616250bbb3ddf789b81bf4cd85d7b686c. 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/GBLFP1576864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089cadf82490b301d1fc0d97d80443232bb906bc9604ce2b3ca81dbb7cb86693. 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/GBLFP1576866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4381808e2cff3d8b973173837aeb84c221906bd1a27bd09ae4ec61d544df5176. 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/GBLFP1576883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a25163e61ccc5e91307fdf3d094184a9dfefa7aaba4bf4da705e76ba7e82182. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/GBLFP1576893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c866bdbd374a2bf28c99f9f6f9c097ec179acddbdbdd5f1eee7d8a496f7b9c. 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/GBLFP1576894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cab44dbaaa88a60e7186beb338fd56ad69542510b425804d17912cf418abc53. 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/GBLFP1576897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa973565974a1a71b4db70079065b76fa1f0443bb1ce677c3d02c8e3d4b712e91. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBLFP1576932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1e15f3e6feae25ba7f3476de77282252f6e51b87ad75d238df1ff00db67740. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBLFP1576934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd493d5b4a686b3476141675af6a746d0d2ca72aeed32da758d9a70e7e279393e. 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/GBLFP1576938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1aff788049d13b767e30a72b8d3a76b0f313e10dafb00b304a5509f7204c66. 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/GBEU71400112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063a50e0e243a1f7ef4a5c0ec9713a7401672430796cb943e0625422e5846612. 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/GBUDY1813601.