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 0x11e8c1e9e980f6644c3efa24e3be9eca7195bf0310814a288663b4a2818ec6d0. 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/d913ea25-a6ef-485c-ba2e-3e816b5bc25d.json and https://artists.proofprofile.net/proofs/artist/d913ea25-a6ef-485c-ba2e-3e816b5bc25d.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 0xdd9a45210c0018cdf5309c030bcf2d2ecc1adcdc96cfcaafbe1e79eb4ac67246. 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/DEUM72002542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c5c55f2d5ede5d25b31aadb8f0ff5dad9ef1cba06a29e4607ecc35760af90e. 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/DEUM72002543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e8e1b0206042780dc32e1c3d3e37e180c23367d3fba48e9db9fa5aaa1cb609. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:08:30Z), 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/DEUM72004247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f10a8e63a43330401501e5f18b320ce2a80348386be0f1a48ec05af0d14361. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/DEUM72004995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b522c023301575dd1285bbdf5426822c5cb8013a56f380abb383d74470387c0. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:09:37Z), 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/DEUM72110199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3523be8b4c6c21f135715e095e7b6d241dad8c11430600ecc0b210c71bb068ee. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEUM72201530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7f3431509bf721afab80bf2b25d749c403778ecb28fae068317f802bb5bf36. 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/DEUM72309881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d201b92604c65d4bd1036b5da2f42d512e0ab61327f589194701512dc6ce49. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEUM72310973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d33af10be3200c1e791c66c71486015f62b9f348defcf04862ef484113cf970. 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/DEUM72006593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5a6262be84e880e01bb3c2f35794f1884152dc7cfa09325ee22d4394b96984. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEUM72200523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49ea7a5a7716c0d405e04b049076a31e4e4a90885b6c85bad7259c607805ef2. 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/USZ4V2100168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49ea7a5a7716c0d405e04b049076a31e4e4a90885b6c85bad7259c607805ef2. 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/USZ4V2100168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d1a8a7e65ee87e1485945e5d352ae0dc1831ad11ec8b324b2db80e17784a21. 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/DEUM72307414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa1a6d350e7c0ad421a7eb888112a257e48eeae5b0a4e411778aecedb929eb3. 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/DEUM72402140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5a6262be84e880e01bb3c2f35794f1884152dc7cfa09325ee22d4394b96984. 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/DEUM72200523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab346b10fba592c04b59b456a49ce7c34e057ecc98fbe01905801903896153a3. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DEUM72006826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e582b97fab1ade6b3f7e3c1daa1a4f2dc73c4c7305d6cddf2b9a823155bc15d. 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/USZ4V2100255.
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 0x84f331aa49006ca18fc44bf7cb0090658c9758faedd324f98780f3e6fc8c2e22. 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/USZ4V2100241.