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 0x5a4c0fa9aa3d4083ffa5b585ea15d6bdcaa8e9ef26ce8bd38452344157de7a4f. 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/d30a0269-2770-4f69-ad7c-4ca9643ffa1a.json and https://artists.proofprofile.net/proofs/artist/d30a0269-2770-4f69-ad7c-4ca9643ffa1a.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 0xbf20539f4e619514e330a4023b277640e09f9efd99a2f8e664e2e60c6c3c3e9e. 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/SE6QE2333899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4712e0630b12f69ffdbd4dd76a7cfb5978884a91fcce789681c8f94b2d8618. 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/SE6I32482873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5763c5d36e924cd3cbaf6cd5ee29e020bbddac9db9d04a5f1d69f74b5a2bb3eb. 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/SE6XY2302944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b47cd0024397247ebd7d90fbd05dedb24b7a21e2894fd1b5bc049039cccac7e. 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/SE6HN2336245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a960cd8bc1108ebc6ea27fdb9e1ad275226422a58c4886d319d1dc4bf522f37. 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/SE6I32365646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f00b9de52afb5077182b1d0171527060f26b19375de304e478d1c8ba748fc43. 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/SE5752366620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31383ce598467fc0b0a87dcce08b477ca561ff6b8cefb5a885304d0e5a8b8421. 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/SE6XY2344989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ad4cb3b1a640744da2b09f862a2da90118cc57471190959eefed6f3a5e7bdc. 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/SE5BU2574231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed72d111badacae3d1b59236ffd69a8eff5474174c93761d4a3687493f1e203. 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/SE5BU2549456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc215cd05aa9a2d83624825e08de8d559217b5d61c073c0944a29a948e159abbc. 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/QZZ7Q2469589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec903633d0cf9de0424e77eb6269ecfff858ff26e6cd5e91ef519c010ca26b7. 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/SE6SA2470464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab88238881bfe9b0b8b0e5f9f8c36fc14ee04986454e7f3dd5f4499e0bd55b9a. 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/SE6SA2452413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a074f69a1684194c5d81a36112fa5f23240ec436bd6f25c32e1194fd5126ce. 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/SE6I32432958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e26e7fe2e31d0f48686c73d9be76c1300285d964ae4eb553063918292d9635c. 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/SE6I32417779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a51705f74f1debd102bfeb8254c3ff990a35f4b409d7aed82ba62a42b7bb2ba. 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/SE5752477571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f06d24aef4073c269f20b75ffb46612badd1b1514824af3af7420061a192572. 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/SE6XW2382029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885a18c33d6c2d967690b78ef629b3fdc4c404434a6dfa37f16cab6724427134. 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/SE6HN2360298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e53386cf6d6c41cb85c1343529eb005565185bfa9fd063b5ccdfcdc28eabe6. 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/QZS652346707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb4d97a0fd637abfcb023b99b82cb066c62fcdcf4452babade12164c2c99dc6. 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/SE6XY2590075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0e1eee863aa22e436c25633ce116caa374c5a4426726b5988f81d7ea332f7c. 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/SE6HN2363112.