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 0xd9ecbbe865d7646c22ff02d14d3960f9ff786409034b5800f7348a4ff799c829. 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/53d5a2a0-f79d-4bed-80fe-d56d141e8aba.json and https://artists.proofprofile.net/proofs/artist/53d5a2a0-f79d-4bed-80fe-d56d141e8aba.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 0xe3ca92a8dc8bd4f274993a4b78fb3344b1414b06343d88a31983ab8a068e6046. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USR010910134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf48edf7313f066f99e0dc33c198d3937a7824b86ec07f18354955a39c1503f. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USR010910136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97f4a8f905bdcd1cbd21ca20ecfa0fc1846987cf3158d79cc79d3b9e8bf8d94. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USR010910144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cf247455f5dcd0ec789673581d5004fe8fc695103f49da4173449db8fd6a4d. 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/USR010910146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f2992ad7a34e3e4c4fe3cbf472e44a93eb2830da9ecbe0d0c8693ded94ed32. 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/USR010910147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c34f3cb5338949c54a9e8eeb02212acb9458ad44c7495317db119e932efdc3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USR010910878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3930c9dea9c37e7fb9b1e16be4384ed1a51e1e3c497089f341f47bfd1c565903. 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/USR010910879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d78ebd43a1595086f3c8fad4cb699aef87d8f725f5e09dedc0902c82dfdeb50. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/USR010910880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97220bcb0d3e1739b9bc887203427eca4cca5490a300fc8a5ed38e9290aa3996. 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/USR010910881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe55a2fe7c02e8a27f1c1b269f947c0f79adb959440bbca7d9ce7242a2620c56. 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/USR010910888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e03da8731d6443e2ee206c87f3fd0eb29d67a5be7e1ce4e6516ca29aa953e7. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/USR010910890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929624d1765ba4e282e075997804409c96bca09213598d4242fa84d45bccb8bf. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/USR010910891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026fcb22fc154665bcc26749ef953a68307b31c37c84ee318435f7e9bc0e08b4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USR010910892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323e79bbf4b936223e93104b502363a272d6122ffcebd941a051b274e0d18901. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USR010910893.
Vuelve la Gran Rondalla Colombiana: Soñar y Nada Más y Otros Grandes Temas del Recuerdo
Viaje Musical por América Latina, Vol. 2
Viaje Musical por América Latina, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8204d4484c10e9fcce8cc4b5bab8c12749ce38742f9c700a72686d9e0d8e2b08. 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/QM7281581151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1983fb22a09a75291a3b53fe98f08eedcd21ff97acd0c3f1a03ed0cc059f07. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM7281581153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526a802e5b571c61858df1e2707866f0a3067c4e5df3d0d4ad2f2915784d634d. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QM7281581155.
Las Canciones Más Lindas de Colombia, Vol. 2
Las Canciones Más Lindas de Colombia, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8dcc7e9178fc3b2f2a14eb8f5f9ef5eb974f15f9fcee14aacde67286ed4ccb. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USR011012806.