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 0xfef4f1e1f91e2a1dd912569d6f5cf8f8b797eae9491a77508ca6c9f37ff17bb3. Chain 2 (Bitcoin): anchored in block 954025 (2026-06-17T00:32:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/38b6ac6a-de53-4d18-b199-4cc34a6ef63a.json and https://artists.proofprofile.net/proofs/artist/38b6ac6a-de53-4d18-b199-4cc34a6ef63a.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 0x5af16006f91fbd083af4bd91213e4bd793b943f44bd26d2df624806a59a772f7. 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/QMFME1929428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9432eb1c61b39f2ea549f7bfe0de4ea6b05114c951f4ad11d6a6641a2dffccf3. 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/QMFME1929622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3277d4540285a137875afea333b77a809dd10a0231ec33700647fd4165978b2e. 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/QMFME1929617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9ba05d042207db753bce97ecfaf40ab54886a4267ff2cdcc85a81c04b74a8c. 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/QMFME1929629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5550230f5c71051c6760402ae2024bb1955e26a127b0ed3362610844e8c031f. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QMFME1929327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f289b413ae4301743dff101609663182b8b4a5bedd36454b469ec8d06d7759. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QMFME1929331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2390e68a42d5fae3ad98238181811d18e485e38e581e7ef0b1aa41fa206e4c. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QMFME1929336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1bb787dd590b9874c3fedd359679f31d746a741535b178e94d99f1fb4b28d77. 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/QM7282071759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e491163afbfabb6255e7e4c45cce2c51bb9e61cec9b218c5946dfef6d07a73. 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/QM6N21599945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7699760e6b6844920b55cee067524f26253614ea0e7703171972fe64a8d583. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QM6N21599946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a8ec2058ad41bdcff6d23fbb1e64811f70974ecb2e17e4fa3aeff7fd88a429. 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/QM6N21599947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5927b7de979742d27dbdf35afc8907d993b1db22e91fff02898762339a99c53. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QM6N21599948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc046fc7fe54edad68d4f18d8155eca73fdef93fbc3a710fc444e4cddf42e88e. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QM6N21599949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35b766106b02250d4f75066e5105bca2573de76de325151e4e125b6d4001ede. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QM6N21599950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ba7aa46f379bc9fbd3158463067139426ede493128f9e3d08d33e68a6524ff. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QM6N21599951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd079347df50549cfdd05b06946f00ef07115c7eb5fee81148ad85a3073884ded. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QM6N21599952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf488020671f462e6f45c775b52930ec39b6684a02b9ac7137c862d78832c8d. 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/QM6N21599953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6603ddae5a40ef1a16c0ab4ea4b43b44cb8bebd276a2f861fa03c4615a4f81ca. 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/QM6N21599954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d840c6489ba5f3e6b65a158345392825fde0118f2d7eafe864c79ea1a0eebe. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QM6N21599955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe4fdf6ea7df0fb1c6a62008f3695c868bc51ccec82382c2fe3e500ca0d8fd0. 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/QM6N21599956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf077b6a21549fd1aa20e370d1d42a519a785ef2ba972f07dd6c1fdb297ce5add. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QM6N21599957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c037192c9a1fa76e333f8d0a693dfcecd8dc562875bf2561e7208ab1d2ace0. 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/QM6N21599958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef0f13b17d61251ae35c11317a5f95d70f6cb520822569dc32a4012f8e030eb. 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/QM6N21599959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1054de0097f2a729bc126cb472622f1af802de262f086677b8742500d7d73b53. 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/USHM81798418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b558a99ca88e569a0030dccea897c9adeb4760e82c4d2ae0a547c6105a7924. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USHM81798421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4913c8a185c39abbda967c8ad6b2b020ce60559675b293c68da20af6989d86ac. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USHM81798428.
One Love - Mujeres Cantan a Marley, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56865c886b697524fa7ee9f265ba4c7fe69fb6d06c01f0515e5c02e0c4f6cb0. 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/QM4TX2231471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4e2d68b3f35c23bfcb7624f14918ffd9b50ffc3320429d81d4606e34bfbe7d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QM4TX2231472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6576c3915cc6550c4f4443fe21e4188296912427d07766d6955abef3d771d7c9. 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/QM4TX2231473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d1f26815bea5e1551c8502d82c109f8f96a0ff3d807635ec4b0a7172ec5b21. 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/QM4TX2231474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfa80dd491d8326818da054ab36014804549bbaa86acdb0a75cd94d910dee52. 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/QM4TX2231476.