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 0x4365fb0bb1eddd831bc739ecff099a99a1dbef473a446178e2171ade5c8e27b9. Chain 2 (Bitcoin): anchored in block 953598 (2026-06-14T06:40:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0caa422a-0df2-4ddc-8c84-1cbf44c31fb0.json and https://artists.proofprofile.net/proofs/artist/0caa422a-0df2-4ddc-8c84-1cbf44c31fb0.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 0x3a9a8a0db669e83487d7556e70c8eb4b8e982f7068b8f5fa7751118e381af55a. 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/FRZ081900335.
Melodias de Melancolia - A la mar, Op. 119/1: Moderato Ipnotico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64499f0a6125f3199f5f36fac1dc461e9dd9156d493977f0d02815fa1bed45f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRZ081900337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4db5a3d5a8b7c7585d88c8ccde5fc9b93fc60687198662939ae70d72af856b6. 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/FRZ081900338.
The Speckled Book, 12th Century - The Crucifixion, Op. 29 No. 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcbd45313ee8360d5ba7e41f724b432df2b2f78f5d49339b69945be7c56a9f4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRZ081900341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63c58764bb7d344250d4c805ce30e5a63e08ddde398d686587a2327995b56d3. 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/FRZ081900344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70ee0a449e472fb992bbf3343f06d161e4f5ea28786d2fee6b11693e310c284. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRZ081900347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f364823565b839c876f4c023dab2323551b888f37625b495ba92fd21a7e735. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR68U1710010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf033edd39faa6419517ca7ad4ca817140ee0acd90a14bd9d1b6e614627e4654c. 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/FR68U1710030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89a7b3700d06b4bb267eafb2a0ea2ad1637a03e234452ea313e258f4a9d13f0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR68U1710050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523debbbdb0d1ac73e3c81e81bf409d0e39c71badb3e29761672d0d1416c8af4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR68U1710080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ba1b469bd86d4aacd09fb740d019db5a2ebe27e221b931fcbd07f5be524462. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR68U1710090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4044826c38971d89dbb6b71073d8b8a283e2a3a8e5e45b46dbc1ad6412793ac3. 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/FRZ081900340.
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 0x4067a6e7d0f32faf18d86fc12732af523bd940c1ccccf86baf6ea58feabb89a0. 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/FRZ081900345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208f6d7554869ac0e6183a8c5d70d9193584a5ca87fa6a6010adfbbbf80d7d4a. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FRZ081900349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10cc5e6f773ed8cb01af0af81418e4cb9d896e79daa7a86810fb14d2c6e99990. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FRZ081900355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b6f20132d0eaff75563f087fae0ce1b80c7653cc6ff33887fe6bd8897327c3. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEN961304450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbc4f2cbcd6e19fb65f520934adcc47b03363074298c2c4f277bde0a5bd15c8. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/FR68U1710020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6772e59fa808d75dfb1e7e47f92ac2faef4559b2d197753c54e0c222ad282a. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/FR68U1710040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5ee7db288e9d8069ac423e06b0c7a7e95e96fcf08efbefe4a8bf2a6f30432b. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/FR68U1710060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294bc34f173ebc4040c1b8ce5410262f0ce0091daeb993e4ee2ff0507b1b7e09. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/FR68U1710070.