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 0xbf891b8a4b300e10f98d1a45b0ed7367ac1b877ab6a44c9b3d013e00de362245. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b1b20da-ff2a-4588-b1e0-00d97e36919e.json and https://artists.proofprofile.net/proofs/artist/2b1b20da-ff2a-4588-b1e0-00d97e36919e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La Hèle: Missa Praeter rerum seriem & Works by Manchicourt, Payen & Rogier
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 0xf4bfe94713448af78e96e2089e41178d1d727d2cc5d9b555637936231285791d. 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/GBAJY2443912.
Regina caeli: II. Resurrexit, sicut dixit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c3f4c669ad9158af0c097672dc33513231ce647bd5a50a5ddb7067ff4736bf. 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/GBAJY2443913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268228298ea8802f1090c16f2ee95d554d98b76b5387397a1d9a6136b2885e78. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/GBAJY2443914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47d959615d463854a6f01eadcf519baf02c92003cf24b2c92d9ac1620ad0fde. 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/GBAJY2443916.
Antes que comáis a Dios: I. Antes que comáis
Guerrero: Magnificat, Lamentations & Canciones
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7de684981940f0ba58c9770b6c207161e2b4b5e89071884244cd146dff59212. 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/GBAJY2134726.
Antes que comáis a Dios: II. Antes qu'en vuestra posada
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e1e5e6e9e583814953ecdcaf8568796f8e3f37ff61199b07da513d780ca67a. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/GBAJY2134727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f148d02d37b85df8e5eeef5f695f49ae77beb23e48d09b7ab33c847441e05c. 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/GBAJY2134729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69cddee4bba41039d323a846bbd4232ab34b9c1f9c770ec9ee076dff9bcf73f6. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBAJY2134730.
Si tus penas no pruevo: II. Hiéreme, pues el alma
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27ef2644e74ac7ae1446f95d0b54516d20355c99685821fe638e7f1d2af44d5. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GBAJY2134731.