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 0xa41e17c224c8fb37f1158da4445eda78d170fdadb3ccd54121089b0d61c0fdb4. 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/f2f420ef-592f-4302-96c0-10c806f167e9.json and https://artists.proofprofile.net/proofs/artist/f2f420ef-592f-4302-96c0-10c806f167e9.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 0x9e1c2bb7f82d3267ae29bbc28c544dc953169d849d56deab90cbce93df248186. 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/DEZC62363738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3f45e8de798dee7554de320c84c5ab0fe645b49c56f2ddde8f57f3956bf3a3. 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/DEZC62357042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a314e7ea4612acbdc01929aa3d374387bb090a76d88683f96087b1d7c805ae9. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/DEZC62341802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7e0829c2a7de0b7407557bcce38372052ff11c64f8c818965a8983c5574cf2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CH7812359780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99e13dd1566578ee775a8ec0062d57095553bc42eabecde1ee01d03d7b8b6ad. 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/CH7812413522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e97acf18f43957357ac699644673c0c4c9d2fe449acef6533006840d5939e2. 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/CH7812412459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72e7017f75eef23cad081f018702e8b176773992fc26ef17239222b1b848161. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/DEZC62416154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fd1299e6b7dc3b2f93303c115dbb6713c5f8475b2c4cc251fe533ac988eb7f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CH7812408388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ff995f82424e3857124671396b5690bbf09b0c69119cbcf79a7c346919a57e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CH7812402092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359bcae9be834c289c87bf99f1173efa39b9753cf6f7381f94a499360bba01e3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CH7812405253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f10f278fa021f320c35afc19aed01c305b0f02259bcf8020ad9f68cc0a2c523. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/DEZC62406566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76f7a31d7545622922a3c325b1698051fbe3c8d7bb7491aa68385702b035171. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CH7812403914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c5f83db51c7fe7212645d759f9695135fab587796bcc2321943ac309996ab4. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/DEZC62495789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131a5dff1d7282cf703336008abcd29c11cd5c86a4648c5ab521c2bd11b3bf74. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/DEZC62492407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ffa458074dff357ef58cd04378167017cef975f7653aa8601091045db3a474. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEZC62384653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62ad4aa362178676dc23ab7b48049483c4e2fe90bae2eca46b0915b26cb299d. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/CH7812368282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd65739f3f7df5f96a40734255aeb186f1cec3c3a232c0ef0daf6e5076ba42c2. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DEZC62377624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c24d648ed30a9a9718353e622b27a4fc449b5fc02fbd2bed155f3ac829f1a0f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEH742325320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3a89afb5a5dbea0a37b41f8fec8bced8e74ccb5ca0aae0aca9b33793977a1a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEZC62366764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7299e46f45676b0a6b9036a751e8bae008e3d287adddb62e9ee26f70e8a6a9bf. 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/CH7812357795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16dfce71b3bee98d6e47d6c47a0658640acd865369069060a2a1147b3ceb53c2. 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/DEZC62349506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60efdbf2a524baeed635e2651503073d43ed410801921712a3449f496ce24821. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CH7812351695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb60df316300818c19f662fafdf7bedb99021eb0b0d2e66600da6dc65e8de7a. 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/DEZC62349505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8f0baefcff58450b4a798cc320d93278eed6d126660de846045e68ea074393. 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/DEZC62343178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2a482148116e72ab45468255ac432a4cadd97d51830b5979bd831b09572e4b. 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/DEZC62329915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecaef37dcf32b723ef62ea6698ff0f974775a59db3f90a2ec34e3571a2951f58. 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/DEQ022381431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70fb17684513a399daff9df1b5bc86aa96dcbd0337f0ed393a9e457f01f28765. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/CH7812346201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9857658c1e6faea6fe2e974f5729f50c6b5242f76e0f1fb4006a43738c8417c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEZC62322012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6ba521b7a7889a41bffebf8fd2cdb72269524bb3aa3fa0ee69e99dc1534d9b. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/DEZC62318206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc20cb4459de4ca294e581431d1451e7464940de5094c38ac61884d5eb4fc6d8. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DEZC62216645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b363d79b282efa037f4126cdb1375710837831e5f3f2e7ea02d7742524e858. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEZC62213818.