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 0xc0fadfc6667564b8d865914ed38264a31180ea87fa4e12e0f8a62a04183b160a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/567e186b-4c5a-4e82-a77c-3547b2427e72.json and https://artists.proofprofile.net/proofs/artist/567e186b-4c5a-4e82-a77c-3547b2427e72.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 0x0b5d3ad5840b9cb300722a8b915c0f734e67e05e473adc9746596aa159ad3ba7. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T16:04:07Z), 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/US3DF2271631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66106018c74c1dcd95169ec27fa10de0d7b64b5e3eff64e67a8c3df47192b042. 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/USANG2247093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afc7a3cf006cbdc40027897fc3bd7b05208704e9aff057f25915dbe66f8dbb1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:55:10Z), 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/QM3DF2219101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6aa13c8189e4c1a4d6f85e6cbe2a32f8678f4303848ebe67568b6efe16f131. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM3DF2248437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057481373904c0646dbdae35682c7b1c0fb1f83a8f3a9b9136a780d4e07c4e21. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM3DF2248445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48217c7ddf92ac4dfb9ffba94d390187b360199b4416c97d6599bdf6a24f1df4. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:27:31Z), 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/QM3DF2257912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e28c96ae5e962cf267e24bdc53e604fc0fb99cd752a95dfca7ff8833f16700. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QM3DF2257919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30860af045a8293998863dc0453074cb7c8de12e32ca97601818397dc65eed2b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR9Z62300647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b018c6f12fb0d304a20fca6aab34376e8e5605cd0168da53933d5e84484988a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR9Z62400708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8471652ebecf8e4148e0cff887661d8e8fafa95d5985b7c5dbb413890d1891. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CACWV2559737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75f9876214f8bbbcfce78e80854039b1930d9b0164506e3bed351e2f30716e1. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:33:16Z), 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/CAENV2583931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92dbbdd8a5a4246fdfbd31a7455838f114695acadcb2914e4c6fad19e769840d. 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/TCAFS2100377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a83960f460d30fb287a8ca46eff48eef03a3f2bd6c17d8ec477e8b68c572f9. 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/TCAFR2179324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06e845cf2c02aa6c9ad33a15ab1af400d011e267fa23d2863785a43c570151a. 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/TCAFS2100382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8c4062763425440a91285e5a6e468b7711f14566ec31ba47a092ee04f1b53c. 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/TCAFQ2171276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c54ccf9a4d9b5e059d9eca1938c4a87ad36d7396fb61c7cd0fcad21f35ebe97. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCAFS2100387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6828653b0f54510a2e32de025d5ea2304ebc68ac048d0654b7b133199a2bde7. 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/TCAFS2100391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd9d5a3363f19ae20d806a176181f2c1c1f7f2a22647c3200f4f4bf893f09f9. 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/TCAFS2100396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213e5440426039425210c776ab2bf3c99e66a0338c600c0795b3fee5b6ad1a9b. 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/TCAFS2100398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fb44de3cbe1779ff4c60d23ab1c777a2afe7abf3f212f3a4f6533649c0bc97. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/TCAFS2100401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a8bdee9ad4366b3f83a1adc3005bc3f94b3cb7fa261e83812f31de10e2e8e0. 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/TCAFS2100390.
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 0xb61aae8c23f00b3b728f57b573b7f5b1c16b41c45c71618be249ed512a74bf55. 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/TCAFS2100392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118c7829cf804fb6e59747d08ec03532423fd3cf02d9b2c7ce483f71d4b21544. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCAFS2100393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf196bc5d8e6715f5bad86f7b0a76e61f87f652a61f89a5204148bc5afca691c8. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/TCAFS2100397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc05a3d5c390c7f6e8f29ee9dd6b957c03cff3233ed147df86f56a2de4fc84b1. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/TCAFS2100402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cea04477b7e6385e47c357ae821eb90188e8c2c76ab27b69c39e2aba84304a. 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/TCAFQ2183090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cce41c3dd4c062ada31801697d77fb29915245badd7130f34a985cb624fbc7. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USANG2289915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da7704fa6521a56e4f580d5da31d0f6f15ef326432e2c13f1ae3b190527a9d8. 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/FR9Z62101132.