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 0x53e02169eb91708019de6c6083aeb09a7640423eade4831cf893044f0f14368c. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd2d4108-88bf-4e80-a38f-ac3f3bfd48a3.json and https://artists.proofprofile.net/proofs/artist/dd2d4108-88bf-4e80-a38f-ac3f3bfd48a3.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 0x1fafafcce5ad85c6cef734f3140060c103373f7a8f85ff776b94956a60736ac4. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/TCAEC1960062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036c130ca8dc53a49320283b21caaab410cf18f409998e01b518d2aec4afcb27. 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/TCAEC1960068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5addd025ced923aba304aca28a4ee9baf81a16e814ecf15c4f44b5336ea9630. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/TCAEC1960070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe640a32640fa9fa1fd560b9e22795b9d1447ef15855e4b6cab1f59c46d1b674. 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/TCAEC1960073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c839083660143aba23fe2fe6b4003ae81cfa93bca0943f5b8649afae91e394. 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/TCAEC1960074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0b0b8056a0106c5e1c7ba32343574962f34421844e7a9adc106a18f5c7bf40. 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/TCAEC1960078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79e7a7912e90255c3516af01aa3d527bfcfefa12ca1f8878d7857864d71ee46. 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/TCAEC1960080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa416252de71db7cfd7b2e3a131f8d526ddc40cb2a34490e6028d6eb8ba3ec401. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/TCAEC1960082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19816e26573f5152e5521438524884a5a77a99f6a9a987c6c246bdf5ae7467a. 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/TCAEC1960090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84aea0ecfbc1fa95979865cd7f82a1600640ce10569fd812c9478cc249405d73. 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/TCAEC1960092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7e0cc65c879974d1d8cc9a7917cdafcda485d3e546d19f88bde0c1c6891884. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBSMU5231926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd90f8403afca5015e920769090b1b78d079d71b4f173f488560893a5def8e2. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/GBSMU5139146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5ce9de0a2a63d8a4db91f4711110e3bda99b7dc86751dde99f3a4274f6bca1. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBSMU4453592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94a901e8aad1e344796bf77153a4668d6fa055a4d5839efdbb75db87c536967. 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/GBSMU4453593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5005af6277ad42dbebdaf869a21276237f68414c94cea350af116ad68440eae6. 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/GBSMU4453594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb3c03117752d7aff2f31cabe1e644a006e191ae4948027c02240441cd7e0a0. 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/GBSMU4453595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54828e9e39cc5ce364ce644e9caa49f6a00b61b5f48b0b0fcbcaa1275d43440b. 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/GBSMU4453596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9423b306f844b9614128599fc699c349d3f0256f2cd79fb10826ff8bbecfc8ff. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBSMU4453597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8dcffee2a4411c144ba04bf8af68872980fd34b7f2f74ced08ae73300c6aec. 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/GBSMU4453599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edf7717eea8d1c9486763d17e6e9d06cabb3af74f4cbf66c845fbf3d21f233d. 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/GBSMU4453602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2a5340ae9e0550e59b3343b258bcd95a5220cad7d3646143c4ea22a2640e25. 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/GBSMU4453605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2ad8319c06c977080a27f1466571fd5f44bb30abc74e7211965fb0aae7e337. 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/GBSMU5385919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d031ffea01ac7f8f9781690eb76b8c7896a6f465a081e8b560df2f62527fae. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/GBSMU6135652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3575d1e78f9ae4d338a5a66407d8a0f413dbe4910584f87e365d21f67193c0a9. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GX3HH2233133.