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 0x576d94f759188e847876106616bc6d8991e2005b8579ab2036eead92405b4e50. 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/81fb19b4-89a8-4ea8-9675-00c84113a7bd.json and https://artists.proofprofile.net/proofs/artist/81fb19b4-89a8-4ea8-9675-00c84113a7bd.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 0x77e8005bd27891bdef6f1483c8ddb991bc675d94ac42a8c23b5565ccbde3eeb2. 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/FRZ360500383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd0077b3f234b101112acf5abdc03902403f5b4eace7f82d27692e1e4294385. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FRZ360500384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3ca40623f463979925aee738e49eed8c0cedb491b7725e5b92a94ab610c639. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRZ360500385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a41c639d7425ec3ffd59273c8472e48698a6551e44684167b28ebaf4e653d40. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/FRZ360500386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1ea0a4c301101311a9a396eb16b846f4ba5d2f531f65a984627339d93d50f5. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/FRZ360500388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36297906056a0bbeaca2ba475fd48e05f26d67b0f4801e6bec672f34797b91b. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:30:00Z), 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/FRZ360500392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef1a80971f7ce8d8691a263a9af97123e3a995ea78174285472e848c121598d. 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/FRZ360500394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa82422162d3b8acd6010c6f44d4b1fe9f4473815882b5fceba591fe9c0078d. 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/FRZ361000619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da8b3072c06bca71b0136bdc1e22a0c431abea39750bf0d67eb98f5569b460c. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/FRZ361000622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2599283549bdde4afefc2165586f51fa9b28d7b289f4879163d25dc28418578. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/FRZ361000626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2736d4cc4ea7c8ecf533a72bffd65d80c92484ca2988671d397ed8a9ad72164c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRZ361000627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70735d488a5f6de27c07b0eaa57a1d11dde597750309ee281b97d918ee7a7bb. 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/FRZ361000629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba5de1d6be1e42148813730abb7cd3333f372b2ad588a791a0b8340d2efea15. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRZ361000632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82f7536c2bf6092fb1fdcc18a146e3bd0416571fd0e17f18bf9357603705339. 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/FRZ361600636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2389bfbf757e482544ecb36223f16db127fc48ea0266dba4f6dedb1026bc053. 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/FRZ360600637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c61572bb406c29dabcffa43729641c16a609ebcbb0a8f4231097d0140c690ea. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRZ361600640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf269b0f1237e136f75505a2f5158281f0786a26c33514eb48e3e7ce0bce3a77. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/FRZ361600641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807bef6a9a13438d4fde26e824ed377e3b04299539e82cda5ed66098b9281e62. 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/FRZ361600644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566eb031cb7bf14c88f71767228b22a370023dd390de7b0253c64da692fc1ae5. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/FRZ361600645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdccf427811a8cc1e87e93a13287ecbd2f98ea66bb141941925aa45ff8305cb7e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:22:20Z), 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/FR9W12109856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893fa82c2dc06abcc0b6c2770a382d727c2fc280f56ae643d1bd6a95e101a9c7. Chain 2 (Bitcoin): anchored in block 957676 (2026-07-12T08:20:25Z), 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/FR9W12109858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9d7b32d8135f075eed6a1094ee07c7a8bc47f65155cae470fa27ce387a7f10. 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/FR9W12109861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4038a42b75a8bf0de68cdc1b47b91f1a3ae6704186094a426e942203ddb5e74. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:19:47Z), 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/FR9W12109864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af669da99dcae69c9dfac91664d12de00070533116eccadf9ef393524c6832f. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/FR9W12109868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3de881445be1a40651eeb934a4a5ee47035a2957c167317db5d06a33c578f7. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:19:49Z), 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/FR9W12109873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18db0011de240e42e9285266a10bbc0f0f925847e473a6518f4ea5ad2a80a1c. 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/FRZ082100346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18db0011de240e42e9285266a10bbc0f0f925847e473a6518f4ea5ad2a80a1c. 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/FRZ082100346.