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 0x4987f152e44d94e5bed9600e9ab0ae33399cd3c1f4f1edd6ab7ad9ab7f2bb4da. 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/4a82fed2-7972-4fc9-abaa-2a000709ab2c.json and https://artists.proofprofile.net/proofs/artist/4a82fed2-7972-4fc9-abaa-2a000709ab2c.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 0x83e582b4354b86d0324248c34e71a28d2d884c3d6b4bea9ad5b4eb8bb60be853. 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/CA5KR2371403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c966c2505f741c2580791d1a6b18259ee90a4096973a73df579369f46b2ed4b. 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/CA5KR2413989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e78906ee54eaddd0edadd3ada778ae175993d8234b486f88a7d04d299fd712. 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/CA5KR2438737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e78906ee54eaddd0edadd3ada778ae175993d8234b486f88a7d04d299fd712. 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/CA5KR2438737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd8af49349b806685d306106546238dcf7776c5f022fb4c80baa6d58184c68b. 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/CA5KR2438739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39943d7a898ee2e1fe0723f41acfc81169c4ce5ab1cd909371659f348088199d. 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/CA5KR2438741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2cb5ba03892c4479bd45bf8eabce6e2ea1c8493d9fa056f870b872e8e58af4. 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/CA5KR2438746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3e29311531f1d04dc63c7737fec4b3030f4486a0f9d20a9a54d70ae27a27e9. 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/CA5KR2438749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031cf6bc0eb99acc5c4de5f7c94a368b07990147380f52d2fbfa55d5ce42f793. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:58:22Z), 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/CA5KR2502706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b928bfe5a1cdee4fb5a9f3ecfc335db5b87a7acb2790cebda9a01442a05811. 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/CA5KR2518518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6244bc099926b300f70fcee6141652137d93321a1545f317512c42cdcdd5b3c7. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/CA5KR2518511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46126f66309fec8ec643cddda4d79c555e0eaf872dd89681957cea3fa53d1e36. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CA5KR2518512.
I've Got What It Takes (To Set You Free)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0f50178645b7ac81a84d9c589895bbc6126cfdb725b5aa9c31fde170e648d8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CA5KR2518514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a52e6b08bb51353ee5fc908bdb5145a1fa7933b2d65a3c1e7333cf2b358eda. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/CA5KR2518516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074e6ea3033157668ec5d9a051d5add0ea7fffe22d0468266bdbab942807a8dc. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/CA5KR2518520.