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 0xf2fefe4ca5239c18af80b853237a28c7d70619fb0c261ef2a98e467cb0976e73. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ede24229-9c88-44b6-ac9e-34cc5a6cf235.json and https://artists.proofprofile.net/proofs/artist/ede24229-9c88-44b6-ac9e-34cc5a6cf235.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 0x5fc66d1504b2edd17a1b11ab0eec32d18d0981710ad1092aae2bd842399a7959. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:10:11Z), 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/NOX8G2400332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a89f2f3a76e49b0182952d7b9e4e6ca5db98a6c40065b10d5f74038ca83834. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/NOX8G2500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6e71aac6213d5e9d70fb6ce8eba8d17e17d6aa40262f895da197e1b91b97bd. 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/QZPLR2148537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafef7efea6a2fbcb96cc218fb8352080113e27a52ce910b8754aa9f7f79c15b. 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/USA2P2467162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f21ed3628dad47fcab7552b0d6edec4eba5f45e3adc5c3b7ddb97e8d37dedf. 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/TCAGP2285379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20272b85643136e2e1997173a71c9c0393e0a15214862943c745d5b6d01fba66. 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/NOX8G2301980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d321b2505aa42650f173b18540d89a2e76edd26d837c6f1645207b2b817120. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NOX8G2301700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62890152180b2c85fb342f26138c1c4586a534e8a1d43ec5ebbc8c4d2aa01516. 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/NOX8G2301240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d64a6276ed3aaef5f221777f600ee0673ccb9e57e88968fc1c99256356b34f. 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/NOCKK2228010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b7413fdb2cf4083c3d326034c886056ea8abeae951ed741d2ce84d9c5271bb. 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/NOX8G2400297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29412c4eb07424d87d5090f3259d5aa0c1ecc1bb99b8fe2ced651ffe08a9ec74. 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/NOCKK2243030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c05494e2fa043def127d2404b8c5a24e3890f74644c70d2f6aed55ded293f6. 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/NOX8G2400449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde058ac91833c8aefbca7360fee19366a845351fec758b50367d412eb626a8f. 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/NOCKK2250020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647fd1ec0cc8fc983d47613bbfa47dffdbba134f8fd88b7aaf6a96b603a76a27. 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/NOX8G2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ae3d4f0f763dc4bb7e12034d7d0f68894ed83f8156a191c65110312abc7f25. 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/NOX8G2400499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5777b5326b5576c8e4206a47c82c4125073c9a5e64d909b5ac1a2ee854dda50a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NOX8G2400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08da9e2fd9393a73c692bba056f8775c52cf43ccf77448e3b4327a61e81640bb. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZTB32269726.
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 0x9cfeb7a0b63146f7eaef2768e25bbd6d0062540719e23f312142fb52280dd165. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/NOX8G2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb073b1bd508cb283201d961c662ad5c02949b2442c7107645e95936422946ea3. 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/TCAGW2388295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f47acc61764d24998d02fef05a14314ab940124923170b8ce85f63f3fd884b. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/NOX8G2400031.