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 0xbb41d6971819a25369e832a962373238a57acc947dd65b91ee3c39ce657abbb3. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6baface4-3fdb-47aa-8547-373a67c187c9.json and https://artists.proofprofile.net/proofs/artist/6baface4-3fdb-47aa-8547-373a67c187c9.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 0x2f96f0fb07cb236f597a5d3693297f0f8d21fdac65b0f9ee026a8109bd70851c. 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/ITG272300780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab081d16359ce33f936660f1344b503aa6cd00d7f87bd4cc8823a4ab47636268. 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/ITG272300781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3d378f4ef90913ae09707afd6e4ae1f3c42dd20c6da963c396f4d356650ca3. 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/ITG272300782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a72f55d290d5d1d3de57f13f6ebda62bb0b845119e169d883a548f6ad98e3d7. 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/ITG272300783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128126d2fc685ef7e54618ea0500a32442064b8959fb0ecd89aca70876e49b79. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ITG272300784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5591236be7f1b1781f19b180757052fab6ecb1fa5320ef89ca27ab52f90710. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ITG272300785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f6a338ef7228596e965ac3bff2be0f9eb3539defd4358c4cfb90fba5038bb6. 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/ITG272300786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461a74dfc72e80d17c99bd237bc28f09d7423dc9996e2536a74271d03e3aac06. 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/ITG272300787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a8d28a43659884116545bc3db400f4dee89fbec5b392bbe24a1dfb32f52f43. 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/ITG272300788.
Throne Of Gold, Pt. II A Heartless Melody
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547f0c536266807b92faba8ceaeef86cd6de5abc0cac994dcbffa3fa27a431c1. 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/ITG272300789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00827cd0cbd0fcaf6e5eef09903d513c7fab88e89603889d68a2ff2f625972b. 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/SEVVF2104601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41973df41edfce371de096baa4d892f1701b1253ed02fb621eefe5ea3b6f5e83. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/SEVVF2104602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a49c490cc54328b55461c8be7e121f6fd22d5c736f803a0605734be62ea7d1. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/SEVVF2104603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6270c532f5bce4b3e319f940684882e15842acd28e2a35922bc7e1b1e4aaa88c. 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/SEVVF2104604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8742f8bfd62f907b6081114dd959b9d5dc4836f4b9e6f8d14f22472368103cdd. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/SEVVF2104605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618606dc120c2019cacbf7c2cfe7221ec99f1ff9470af583d034fc01826723de. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/SEVVF2104606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3643a0a8bf8fa95a26015152edd667ee99f390f5f0d406cbeeb38d7630e40044. 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/SEVVF2104607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce60538246c042bc9c94b389318e480afd4ecfe0119238ae4bcd7e1d2bca528. 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/SEVVF2104608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f96f0fb07cb236f597a5d3693297f0f8d21fdac65b0f9ee026a8109bd70851c. 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/ITG272300780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6270c532f5bce4b3e319f940684882e15842acd28e2a35922bc7e1b1e4aaa88c. 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/SEVVF2104604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41973df41edfce371de096baa4d892f1701b1253ed02fb621eefe5ea3b6f5e83. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/SEVVF2104602.