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 0x6406bbfe9642096b859cb83324c0fbff4ff7f915dd9d0e4b0ddba980e495dc58. 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/6e732261-2267-4de0-aa83-6bffe185b4e8.json and https://artists.proofprofile.net/proofs/artist/6e732261-2267-4de0-aa83-6bffe185b4e8.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 0x7d4111ea374d58d20b5b968402af09ce67adb7eb118ab64af54293f1c0806d98. 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/SE6892300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec122f2fceb728fa43f322a985a8d1b1c9cdb7b9860ec80f03f224a118cd79e3. 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/SE6892300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb587469da764b8ffd8570a1e0d4d1bca577f0a5d253d33662e480a9fdd962b65. 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/SE6892300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b97b69f9cbdabd2158f28905c8ea494da5485aff829176a7f2a33650b2ac1e. 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/SE6892300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe430d2cad41d4fdde7718f52de3796fb763f625dee3cfe30ceb31d522fb9627b. 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/SE6892300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29e5fb383c5640bf5666712415e1542adb95e5faa2d387c183a1ffbf21bb6cf. 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/SE6892300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f317025c323c9ce66a7c2656d4f9a0d4542022a701ad4e1b68bf6558d93c963. 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/SE6892300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65645cc93ed8fba92c8e643e9a031e00178ec40fbab972826f76761f221b63b. 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/SE6892300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1488774734d169e0a636bb3763d7c059f1890eb4036e277a1e68d61a984589b8. 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/SE6892300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95f6bcc3106750ef5c0b5c50e731018462de00897fb57dbbd2b2ba77610588d. 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/SE6892300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be4b76053ceff5aac39515fb8ecfe73570af31c0d7834c8813aed42badb8517. 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/SE6892300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560aeceb124ed900f14b6c2b9dcf3c9626471d6fe64a1eb56f57b69f4fad4f06. 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/SE6892300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2846f77b8ee1a91845a623449605aab3270462e0a013f8e81a3cf654e573152b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/SE6QX2000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be02b9717ab7e64eefee847912ad64e1ccfca6f5a7e4b1bc709dad0c4e43841. 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/SE6QX2000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9b4d46ecf86129b6778513a2987d124fb35740cbfe37145cc417d02b470dbb. 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/SE6QX2000104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0b42828bb31eb8ed44ee50bde7ac13ae73a790638c05018d0ce56dd285d7db. 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/SE5XI1700103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940678b9441b97dd65dad595c953b5dad0bdef69dd0117cac439d99f02cf8a33. 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/NOAPI1793347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bcc7bf7ab4b09e164fd2753cd82a3ba188b49a4d5ebbdbf4a2b920154d5656. 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/SE5XI1700105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e21f76aba22c2707a51d42ebe1f74f43f682fca70e5fa215e64a4aa22b7b32. 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/NOAPI1791153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73fa43ffa9ba91669e67b84715720abc234b87ff3382cf69c0afee4199580f6. 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/SE5XI1700106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121a5f0a6d4ec7736fcd66313a47b3d940723e7adf376c571b8f521a6579d882. 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/NOAPI1791152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b14426470d8876b2006be0dd43b0f4b9ce1bade39bde1865631d4d75e8fa31. 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/NOAPI1791154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbd90e02c15b88c5c3fb0c2aa8fff1bd320643cfb2694caba50327f45689757. 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/SE5XI1700107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b97b69f9cbdabd2158f28905c8ea494da5485aff829176a7f2a33650b2ac1e. 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/SE6892300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa91bf8946f909b3543be43c72cb43714e19ddbae06cd3607d388e64dc5a8a5d. 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/SE6892300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec122f2fceb728fa43f322a985a8d1b1c9cdb7b9860ec80f03f224a118cd79e3. 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/SE6892300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb587469da764b8ffd8570a1e0d4d1bca577f0a5d253d33662e480a9fdd962b65. 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/SE6892300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560aeceb124ed900f14b6c2b9dcf3c9626471d6fe64a1eb56f57b69f4fad4f06. 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/SE6892300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4190ac7feac039323505b32edfa7bfe83532959c479808c0059adb51370c25. 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/SE6QX2200113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d912546d6fa84a3615cfc9fab585af16cab46b0a0a9f7f3bd54222b93d103c9. 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/SE5XI1700131.