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 0x466c492fb8dd9d4745e5f301a95f00741e9a7bce61584c92f4c844861c4983e2. 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/b881a0b4-a224-48fe-86ac-4dc0db9c1d87.json and https://artists.proofprofile.net/proofs/artist/b881a0b4-a224-48fe-86ac-4dc0db9c1d87.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 0xc1974a791a59e57cc66ad5388eac86dfde4103f9eed10065624f73b80cc4f89c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ES01C1000332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786e9ebe1ba744e1cbeeab553ffd57378c3419dbafff3d3023f16f41010e63fd. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/ES01C1000334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1dc6ac5573d7d3f3c689bb51da15f9e09809310d7b8b2995cd53aa369a190e. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/ES01C1000318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd592c435f1d2d445d934fe042c6cce0a73b7eeaa157699be25da9aa680041c57. 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/ES01C1000319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405a35e2b4a34144de4f40eba8a23f2a68272191acefc4ea8c20c4b25863309b. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/ES01C1000323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ae92becd98b05e2829df135ad8e69d8be07bcc888ce831c621f73ce46d6edd. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ES01C1000325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a0adb22c30bbf5eede737ff6bcf1063d66b01aa8189c45209a7207d5c33c51. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES01C1000360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bb3ee2f5657cc39ab78f11e44102bb2d5d40f2adb1ecc22841d066e829122a. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/ES01C1000361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed778a5129fdd1bed8f4cea008012fc3b1fa72300c41c5130a51e8a200fa8d4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES01C1000364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c3c84162dfd0e6cf9cca83957a5cd63d0ff47ec8db2e2332d9544b99f50b60. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ES01C1000366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af98fd218a1e13e86ffea278edc84287df4b354d01382712c296cc72d84ba16. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES01C1000374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6f601d08032458c69d70caf0f46f52a9a73f3f81200f698dd1389f6e51ebfc. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ES01C1000380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549ae9faa3ccbf56b5b9310ee313336f28bab2cf4f2d689f7222efa11f7e2602. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/ES01C1000369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f3cc48a287cd5891c3cfef7c79c1689071c40437cf0170f02bde396fd66967. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/ES01C1000306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325a3aaf921f1a7624fca55b3e7a54ced55d2e008220f25af86a92da2a2f45d8. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/ES01C1000307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccb028a5aa37d929f815113c6a83fa50d82fea847eaff4322e3a34e38522f74. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:05:31Z), 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/ES01C1000313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba56a86d18aebf0018dd53e4059dacba98adbb088f3946b52c29c745bcf5b900. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/ES01C1000314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82476f102d0510740610bbcb57b7ccb22227ef35474808a8a7665fe47f343fd. 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/ES01C1000367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d409b93fb5507547ab76a9c229244bb5eb5c462d331d08ea9de65b530d15bc. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:51:10Z), 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/ES01C1000368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549ae9faa3ccbf56b5b9310ee313336f28bab2cf4f2d689f7222efa11f7e2602. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/ES01C1000369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b1ba2d47d7093ed7eee69121ec385c7acd8490e179fb5f3248d69de5ffc14d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES01C1000312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9bf0fda264bd5f62216c6a42a3ca6176ef981084420b4f0b4b98168d01b9dd6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ES01C1000348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe45d40a0219c9c24a59a899be501d62f60c18caf834a04c9210dd1bf9cee7ae. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ES01C1000349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa2faa2b4302079c433c193af7400b0c3a58088c464a864210817e41adbfc95. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/ES01C1000350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536d118fbb0255c1971d05e9a0e14dbc9047c226e406ed268dfbc4c1177f1177. 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/ES01C1201405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e33628eabad606a397081696e3ff0a9ccc3027250e80db2b899a0b51a36f309. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ES01C1201409.