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 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 0x57729ec4c1c895166292df188ffb1280d89edd010cd56af765f954e7b7111f23. 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/eeb55261-6b79-4fc6-b377-40a5f88de8aa.json and https://artists.proofprofile.net/proofs/artist/eeb55261-6b79-4fc6-b377-40a5f88de8aa.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 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 0x275a3fdf78af382a5a8eea07cc6ccf42738ecbb9211cd9eca0992c12e528aa66. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QMPVC1500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d306b5bdd47f23bfd982a6ea610f7551386a878589e9e5da33498c28b5f4a4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM2PV1642392.
I've Been Waiting for You- from Scales: Mermaids Are Real
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a270cb3239b2ce690a73317827c0a2c34a550ea5d685bc2f62caceb865ebe2. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TCADD1758178.
What Goes on in This Bar (Stays in This Bar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863f0eba626cf461fddbc310c74263578062d456f913839ad1c465f6d688e1af. 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/USTME1850177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b5796e0092d820db755e593066a6034e29b785614a2e1bceb8ce45411cf1a5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USTME1850178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39e4b36aed6ce444cf71cb90309d64793f3a468c4c16edd2a1361c3ba2e9a62. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USTME1850179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac8d3aaff87d6230f014ed23e0ea958fcd0a44f7fc660595b9a1cb8e6ae8522. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/USTME1850180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305952dd51dd913c7661e6dd5787e2b98237a5a5b6e7015fcbf6278f74eaf4a4. 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/USTME1850182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff517d3d39b71fbab64b339d4b10c7d1c9450c9896697a219fd2ca15470ec56. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USTME1850183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6874df12065b077bcdeeafe0d9e1f36deea16c9a4765d86e7d81ebb572198460. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USTME1750295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e92d9eaf5ecbe059e4df871a3990644eeb1a31158dd9bff511775e01341e7d. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USTME1850185.
Tell Them We Lived (Mission of Hope: Haiti. Hope for a Nation)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5630803e43b9cd597bac4e64dbad1b65aff447492063ce15b2a5fc99ed687f04. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QM4MA2200050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446ad11bb337ae8732a8cc5f0d9d36e683c11f461e463abd5a5871a175c1f7d7. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QM4MA2200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f03f6d450d5376fc5d3380f8fe933c77875932d8c68e961f4b5b4b1abdba54. 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/QM4MA2200054.