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 0xb265289828d1e7269db67a9622ee785a451194220b3079532ab5e9b49ab8602e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e389664e-7c06-44da-944e-1288e63da767.json and https://artists.proofprofile.net/proofs/artist/e389664e-7c06-44da-944e-1288e63da767.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 0x6b09ce0efd8d6f88105b98069ee5be6be34d9ff7409a0330695759d24c6f8965. 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/CH4210800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bcfe963f66098fd80add79ef5d964827fb4bd15f74c58353c68c432050d43e. 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/CH4210800035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4550aa578bbbbc7f755298de159d3cc5f11f9f5640c79ff3ba24d763078c0312. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CH4210800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a16f3fb85530822275836db4560045c15e4a6a641dd84b7a9ddf2edf4191e9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CH4210800037.
Luis de Narvaez : Diferencia II on "O Gloriosa Domina"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e27e06921995b1bd82924a662ca26f85811dc63a894a2b8a341c32a509c3e2. 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/CH4210800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf40df60dc86373798ae994780a60b4f60a3c29f8ea92ccbcfdde70f2c2ab80. 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/CH4210800040.
Villancico: Senhora del Mundo (M. Figueras).
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66dedcb4fa30124896187788d0a8734650b1537e138c8e6c54997bcc046c197. 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/CH4210800026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6b9a0d763c0b5f7d512f77731078906e966e87f71f62cbf43d94ceb15c1a83. 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/CH4210800029.
Ave María (pentatónica) - Anónimo (China)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddba79c0185f6b57ebcec43ef142b1df8ceb37178aaf8afd992c4da21c0d77c8. 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/CH4210800049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797ea1079794ac276ee7bed1772b8f9300731aa79ea049ce92fc54367286d10f. 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/CH4210800033.
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 0xfc768506ba52602cec9116c48654b36b7589d1a5a9f386dc1f9f47855b710a16. 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/CH4210800039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a60362d56ae47f11a10cc45c3240072dd3b5cc0199a248de8674cef6bc52f5. 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/CH4210800036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa398447f756b82f18b43befac4461344876e0dc7b3702787e79d9fad8d779a46. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CH4210800038.
Venegas de Henestrosa : Himno XX "O Gloriosa Domina"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8888929a037ed1a4cdb78b4866adf943aa2a3ece1e3338589bcbc07b3b1083a8. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/CH4210800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac23875f8bfb2749a39a2d569ca44b308524b82de75834d6aa5305c70799ac6. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/CH4210800048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbdf363ff53bcad0f62f2680d3269550b0760e4c03fc8ec967b20b3792748e3a. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CH4210800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb05c94329645104d781c4fb914ddefb8cddacbfd4c8d50c618cec4d7b686cce. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/CH4210800031.
O Gloriosa Domina - Diferencia I (Vihuela)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b92b580504c8b5fd7c4d6ceff5a0a7fbde60d78c6ef9d4b79e2d4ca03b33dc4. 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/CH4210800045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849c4b33de86e7fc3852cb7ec74ccb3aca686e165bab75e6e64b50942c106770. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/CH4210800041.