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 0xb74152a94f7d453c1d0d76b60cbdac6ae4fbfecd4b242d1b5eb5e057929da762. 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/3950802f-1e7f-4536-900f-217f4178659f.json and https://artists.proofprofile.net/proofs/artist/3950802f-1e7f-4536-900f-217f4178659f.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 0x7807528e92c91c48a98c34828dde747d6b7dcad92ce3f665b7cd9494eae5f9c3. 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/USHM91799700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a287e5d2da96c74fbf72d204fa0e9cfce39c2e9201d20d0418aea4002744fd. 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/USHM91799701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894ea0ff844868aa4ab597d7061a9ab6c4ce888aff701da7edca55835a680ac7. 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/USHM91799702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bee0f0ab24ae4b8f7717911c9d61cd2d3ec50b3b7f213b335f77c9f6420aba8. 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/USHM91799703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8909b87392d7ed40243ad3d9df6aff999355ffcdf47fff5f56e754a9b1db8f7. 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/USHM91799704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397332b2f74210669a2ccdba37c37857eb8934b03dd5bc175dacfd336845c722. 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/USHM91799705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20618f3b08b58ef8dc69b64990f732b1f274ca1c2277cbd7a1038c73d3acb402. 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/USHM91799706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbbe138a0d5196779c3853c0494b8d194610b15bdd5f99e043e1a2819dc94fe5. 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/USHM91799707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf9f322189128533798c6922f6b674f2cc970a3df021432a06d3b8f0092ad50. 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/USHM91799708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06afb2fc0d13d5922aa2fa91f89c0f6b60ea02138eaa5795bbe8ea3507604d2a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USHM91799709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d55e8ea6fb155b9456bc4cd0a692281425943472160aab4606e6e882a053909. 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/USHM91799710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a057a9ac3595c06a57ce692ef217d4ab1acd97642561601b173d43905ce031. 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/USHM91799711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe154628f35588150bd39d1982e1c331f1b60060b319c507a2b1d0da302c2db5b. 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/USHM91799712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd8940f5ddd0c706be5d50dd61ef65bda4edd2d1b8c77df2600a0f15ca66359. 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/USHM91799713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121692906d000770ab06d9f8bb38e253d8e20d4accd37e17b7933d22578525c7. 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/USHM91799714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3265544d30da6814ca4b4daecbf7d06604bcf7cf8e7a5dc526dd777b8500aefc. 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/USHM91799715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf907ce2e23701dedb83021f9abcbcecd13cf055da64ff12b7e76d89192a23e15. 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/USL4R1945731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d3d5189ea5af3ef17dec4661af072fe6d6b52ecb89665ff62e0a413b9561b5. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/USL4R1945732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea1d33f55f3b36f9c3295fd533cfc69e41eb5ba5f6dd1ab62aecdbb92941786. 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/USL4R1945733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e849f56ff57c756ec6b3434aa8303e3f7d27cd42d67a8af578f077da9c6a616. 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/USL4R1945734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf77e44f7c633e4129579829b73baf60cb452e961868682d6e70b3901d0ec4b. 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/USL4R1945735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48ba13d4066f6a03bee0e4abdc720e62b99c680e06dd4b7c79f3a310652f5c7. 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/USL4R1945736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61eeb2c730a75394c96211570d1d4f88bdb7ca52680baecfa9b590be6aa13864. 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/USL4R1945737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c2de78e4ed11874cf98c55bbce44a23db5be9a0efb6bf982c42d1e8a9b0d50. 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/USL4R1945738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab3df9640aa434d5d7286520940b822346453694a58bae20aa43132d863166a. 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/USL4R1945739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0f53a69d02e87a601529ef7ff2739f51b2578ba2a6d9a58f2131166e917b21. 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/USL4R1945740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e39612269388d03463173ae66f54ac724d4a98308c9262ee8f67b0e79e5a96c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USL4R1945741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648d92107db62cd421ed172c5872a31596f22df25f806994ff75fb34ea09772f. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USL4R1945742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf927af4a6ad322a322bd7672c4e8ae51f3eab3b1bbfaf43bdce7e9d7ccbcb22c. 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/USL4R1945743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe532c1f9f2965d6d59e4c81f5f67f05e80968b09af12f747c923604a4a03571. 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/USL4R1945744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46368e0c032302255dca8864438aeb8ed6bad7c4b9dd3f48ec901c7144624121. 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/USL4R1945745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b45ce1a4658cdfb8e285eea5fcd890403bad8d925641ce1158983876b861907. 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/USL4R1945746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164d355cff792a3ace27c5b434342f8ba3a294d5739677238cea5615ccfaa89e. 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/USL4R1945747.