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 0x02e4fd230b28f462dcb0861d36791832fd0954171cb0d52417af0ef339f20495. 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/db6ab93f-d9ef-47ab-ad77-088b1e99fde1.json and https://artists.proofprofile.net/proofs/artist/db6ab93f-d9ef-47ab-ad77-088b1e99fde1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
South American Mystical Oceanic Symphony
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 0x33aab65df26e3fb929ce30181485cffe83312bc990f7ef0f715f90290cc24817. 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/ARC572402235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7206e15e009f7a2f94295b65f5b2a9c5d8f1be089b75737cac1eb3e054202647. 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/ARC572402238.
San José de Fragua, Listened by VozTerra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6404f374d2ce9fa4260ef336e0337822edd0106293e28f67457063fd28d1d966. 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/MX3742300427.
Belén de los Andaquíes, Listened by VozTerra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273a4c4eb4727ac72843d28fdbfcfd304c3144ced64f06f0f05fa78ca3a5c135. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/MX3742300389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27eb6046a5a4931d893386061b58da828c7925a074e8b6eaa077e356fa293d85. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/MX3742300390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632ad41bffc6127ada1e0ce4ad7a5dc05edf615339c1b9d397fa235180675638. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZ5AB2152646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a99d62ee4b24f2960ceb72da174117042e86ebb3bb00b0e2fa80df86b3762b. 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/QZNJW2080257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37b344c0c845decd1c07cf75969f834150666b407c84510e1293698ac05ae67. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZ5AB2166383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf18fbe7b28689a1eb882e274276fcf079b4154f9299794f026e587f203ed803. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZ5AB2166384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd505b42c13a289037e8ab6fd7c126dfbd9888b6a3f98037dc5c3b072b9cef19. 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/QZ5AB2173424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a2877124fc058fe62a71943ad45cc14d38b4e96ff8b336504cbf4d5aac4061. 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/QZ5AB2173428.
Reserva Van Der Hammen y Humedal la Conejera
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef304e91b335377d92dbbd5a41ec19abab8e5704ed039fb45b7d29847dcb5ced. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZ5AB2194496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632ad41bffc6127ada1e0ce4ad7a5dc05edf615339c1b9d397fa235180675638. 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/QZ5AB2152646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a99d62ee4b24f2960ceb72da174117042e86ebb3bb00b0e2fa80df86b3762b. 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/QZNJW2080257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc9eae1c8182cddab1dcf851ec095cccf2199da7d686598b6080dc5cbc0aed8. 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/ARC572402208.