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 0x6f2748438bf9313d1bde8b8f6c57cb7f694696617b6e66349f82c24286b6e206. 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/f9dfbff5-9959-4c49-b038-4131ed283d19.json and https://artists.proofprofile.net/proofs/artist/f9dfbff5-9959-4c49-b038-4131ed283d19.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 0x816f1626b33dfd64e89177859f86b986e97c4a5991c1a2df55dc5e97b4b012da. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QM3DF2241818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bd4fd230ece06d52e87388c21be6d5ea91f80f58915964f899d8d1e1301540. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM3DF2241834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ac797b3ef139b81dbebb230d41daf50231dab2228243e60767f3d428b3388b. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QM3DF2294494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28d0833538f58a19fd83ccab56f2c4eda67fc31f3912cd4743b7ed3b170d201. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QM3DF2294495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2091242ed23df1321f17b2ab517adb7fbe1cad129c6d25f7c60a94608c86547. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QM3DF2294496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d57cbbd73537b4fa0e553229488e8610647a3e45be3de7c2a4fabbe5a524af3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM3DF2294497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5152664c1187c3dcfab925f575db1d59ec8a5b87e6e82ef2e4a42ee90fe3d963. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QM3DF2294499.
Aves Cantando y Arroyo de Agua en el Bosque
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb60eac94bd227c7d329607c1c03ee73630489ce495ec6ff3013088f574f9fa. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM3DF2294501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe688ee12a8faced44f6b8f3b03138890bf8e1e4807f5714bfeddb85fc1d0e10f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM3DF2294502.
Bosque y Aves y Arroyo de Agua en el Bosque
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db14a4fa8d1ce9e54ddf065170c5839d9eacb9055b904a65df0b9b99c779ebb. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QM3DF2294504.
Arroyo de Agua en el Bosque Para Recrearse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e90b7adfb3735e5cb91c398f9a0f5e4b5bb3d00c5cda96fd18c07b59297ec9e. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-21T22:56:27Z), 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/QM3DF2294505.
Recreándome en el Bosque con Sonido de Agua de Arroyo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e047bcc5731c6273f5bffa9cd3a12b50d40f2d4376473eff5a3a533b9a035b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM3DF2294506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf1a0dbd635ba30c6dd0cc22c612c650db39877bee5dc2dd3addc98293280f8. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QM3DF2294510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a1b323498ee8726c9638d3b9ca94be3b3234e08f81b445a810fe140f8e07fa. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM3DF2294511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d21b3436d42b93f1747e2e754e3dff29246c4aeec58eb873b3a6e6e21f413ee. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QM3DF2294512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8356f69d03acfe686663e492835bb180d57c0c09357aef07bbe4bf081c02f9. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QM3DF2294513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70ccff0947be41a743dbeae7d64667282beeb21ab660d4b6604c8881fc26629. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QM3DF2294515.
Acordes del Río Pájaros en el Paraíso Acuático
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800ec52fd2b52deb1748e47640b90a2085b2884843bee030dfca13c89a349987. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM3DF2307227.
Armonía Fluvial Cantos de Pájaros y Susurros del Río
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae0c0892afbef14953b2ec2b89d4a6fa713cb9d98cc5b85c9c6712fe26bdffb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMANG2376307.
Aves del Río Concierto de Naturaleza Viva
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8eebf36af80b3572ca88f94313a0737fbb245de2da9621eb10548d1012db1d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM3DF2391860.
Cada gota de lluvia, un pretexto para otro sorbo de café
Escucha relajante, sonido ambiente del mar y sus olas
Sonido Ambiente de Pájaros Cantando en el Bosque Para Una Tarde Relajada, Sinfonía Verde
Sonido Ambiente de Pájaros Cantando en el Bosque Para Una Tarde Relajada, Descanso en el Bosque
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6d1080cfc23a7e223d489df5317cdb17677ef697f7fdd43ad400f99596e9c4. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USANG2403933.
Sonido Ambiente de Pájaros Cantando en el Bosque Para Una Tarde Relajada, Ecos de Tranquilidad
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5375d4ec5c458e3549e54fbb505e56951c3142a595a685c95f6465521460cf2c. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USANG2403934.
Sonido Ambiente de Pájaros Cantando en el Bosque Para Una Tarde Relajada, Refugio de Paz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8e53c4214dbe0634705aa48c142481a76cd159a0534712c206dcede64ee5d2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USANG2403942.