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 0xaa0265a54dee313b593a009f6a2b6c23186f5335ac06a9d5a934fc9487366798. 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/6857dd4a-3564-407e-83fb-2ea62c5e1a45.json and https://artists.proofprofile.net/proofs/artist/6857dd4a-3564-407e-83fb-2ea62c5e1a45.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 0xd4416bb0d5b055a2eec1089683b6242200fe73ffadc16e2b5334742f7424b3f4. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/GBSMU5948042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94464c75bb129eceb831119b519f8e0ea254d4d7c48153b2c3e2e1584f37ac9. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GX3HH2186289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c8ce2ec49f82885d9f5783c273de889fa80aab8aab290dc96a719ca65d2892. 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/FR59R2290625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91515bef68a08f1cf4e8731245df16fd732704dd930b11c32277b6e6fedc94a. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/FR59R2290627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce1ed8e8f23778de0c8afdda6b6068ce5d6cc9bc0615974f9db9be2b34fa14d. 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/FRX872275794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5a66683d73e764c3a40bc2e437cb73573b0e3b31534e528e53dd66214451e8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR2X42316879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbec989f18bc1b8611fde6b77743a449dbe978835ff2de831a1d5f1c8eb2c1e6. 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/FR2X42316880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3b4572f6137710b3bbe31738e6d6dc5263169058b545863e6a21b64da61657. 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/FR2X42316881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1938b8fd3d958b08423a6577f905132be8ce7b00ff48488e1f5b0ee858fb1c4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR2X42316882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8326916b581ed193108576a0398899391daab3a5868c73e99735fce0ae5d29e9. 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/FR2X42316883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eacb5d136cf13ac85a754f8d1b5fe922c2ebc854b1bd530a32ced0d7ebc5334. 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/FR2X42316884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7eb70daab7979eb890f69b8376ad8b3d6d03ccfc89a59be07de6180b23b500. 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/FR2X42316885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556873902c77e84ac8491eb79941208579b1a8c5cb7a433b412a9ab3c47252c9. 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/FR2X42316886.
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 0xc22fbad9fb3153a380a2a41638f98e4afb2fb71e188a18f3c47ececca6226754. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:05:29Z), 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/DGA0H2488045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cb91f51150046b52edd004079f5a92efe86836567d853f5e5e2b36d8915026. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DGA0H2495150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a4b7a931c34724008e7d9ac6ccad26505d5fe2efa6649968f4f4be9cf216ca. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/DGA0S2476388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e51c62ec79fd4d1a66eb1a54336381657bb4cb04f29b6ab9cd47f0ec22ad4f. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:08:37Z), 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/QT4K42506595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a783966c833187cb0b1e66b2d98dd7f0dd8fe7e76572d3365b14b222c483c0. 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/FRX762366032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d200b02d043d22a3ed1e9f08b792faf74f03b7faa96745db69b3c04575d48a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX282395186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b98df9e0e5ffe5eb6f8e9c1dc5035ea680003e459415b8cd1cbffc1a8b814da. 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/QZS652395520.