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 0x8783557ca4790bf55b993b3c46426914aa28ce3aaea2699a04b07d8ac2f5d339. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc9eb232-1c4b-4632-a04f-0294f8d300be.json and https://artists.proofprofile.net/proofs/artist/bc9eb232-1c4b-4632-a04f-0294f8d300be.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 0x113e6a6a3905d3b312b7acb888ec10a17694cb460753eba8e99cee8051388b72. 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/USDY41538589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0173c2e8ebf8cac6f306157141667bd92fac5cf8f37b6884bfd3c79e35e45bdf. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/US3DF1800330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df5018ab642b6d117ed3a6609042f3bce691ef3b94d06848f49dd53fdd01607. 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/US3DF1800331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0552b9fc64f69c8f9dc598d506ff4a17e7623e10881c5c8569a0ee07ba7e8a9c. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/US3DF1800334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e98a8893d42ca60047a539aa044a2b93e7f2bf90f69c3ec6f7c3c2544e9f625. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/US3DF1800335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f34ab94131ada2aca5228737f0df705a39621807b2cc91d04b18f43d20e34b7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US3DF1800336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff389ad49d901ec97d7276f77c780551d82d076c07b552836093450b77c3a791. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/US3DF1800337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da06ad1cfeb2a1e8433acc1840cc3844792edc81fbd83002a5da153bd5579fd. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/US3DF1800338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857f84e755635492b63ad26040842f38f3d3ad6a5530ad189b06e414bcac87da. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/US3DF1800340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74ea04f4370ea3bc5009eeb5bf9ddd0b079e17412c3a7a8e68fdd89d10bb7e2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:19:27Z), 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/QZTVM2227481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453872093415b923eebc7922f601827c74ddb9d306d539ed4580c98d8ba8508f. 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/QZTVM2237963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5d1586686182b226f79e3baa51518a819490fda8d5295a780a9cbb13a2acd8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTVM2237969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b99439c0915c85fdf47dd22032a6abfe603cb61dee5adb834e4ebb1471d54cc. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/US7VG2305841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb432271a27c8bfec2f9588a857eaa673b998d99cd346d37ef7b3d0274bfb44b3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/US7VG2305842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e71910a1b5b3298d5cd2791b91c7454f2f6aa96e6d96009af4c6fdff9145fc. 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/US7VG2305846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e7f996e448c27cf0fbdf0ac1fa018516035b7e6ee1ba99112b05ac338c8611. 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/US7VG2305847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d03a1af2af7c3401b57678ad964ceb5a63dbbfd974061629e50f29823ed96b5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/US7VG2305851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04533e8a34a7cab8834917c695d6b4168010d46c8b07d5ba353e78df29f3685. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:58:09Z), 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/QZDQH2530456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f530dcdd9137f359cdc04b6931d00f0861769872662f460eeadc8c33f07d31. 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/QZ9QQ2300099.