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 0x09ae92225fac0ab12414fc66f1fcd4addc520daba54f0bf18f9f28fa91c646e0. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed2c8346-5778-45a1-a21c-309a3265e79a.json and https://artists.proofprofile.net/proofs/artist/ed2c8346-5778-45a1-a21c-309a3265e79a.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 0x11ffaa274279cb984c756ec461dd7b17d54d9bbd4f9ca26a5e8023986f7a0de7. 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/DKABA0502101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c6bcadb4e5805b44b52abacce226267066767ea809d4d1f790d62e36f15dfd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DKEBA0106001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2371082fc2c4e8cd23e3048fdf24cb64be5896768df9d5238668d8185b165b30. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DKBDB1301501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d28a52b8cb48289bcc8f94bb3ebbde8f30e62a53f888316afe2d807b42515e. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/DKBDB1301504.
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 0x833bcd5ba5c48ba534f8c24f2a3381d375a2c28e73c9bde98dea29265e088b4c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DKBDB1002102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce1919f072a0b1560b990b66683a07de912f7dfa73aefe8aa9a084c09508ac7. 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/DKBDB1002104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430f99331d1363b001d3bc9135f0425ae76cb6810eda2385e4896ba322a41b8c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DKBDB1002107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef842fad81903d056cb736c8902566f7a9a10713c27aa69e606940c9ecf2f472. 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/DKBDB1002111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1594a672b38edc8f3e21cd3387e859e556c3b7837f8872a60f7c51504aeb2b6. 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/DKBDB1002112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039f60f93a0c94d6cef11deafb298c80ac42770019a9e5a03e1ea2f42c59c3e6. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DKBDB1002101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14858ea40b5c3d17338c80af3c5b26c43ba26b48ed0be67efb84eb406770164c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DKBDB1002103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4947459b71ac63092a8b43de21f27e6bbab1ecba6f2e04fe88ba8a233ea40e. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DKBDB1002105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7209f4f4ee3b1e9849aa9a6facaf98f2a75e6aadd0c369ed192816c3673569cb. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DKBDB1002106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd40e0fef45cbc2c3d84589d5470e197cd1bbfa5abdceaaa82d7cdf1c4540a6c. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/DKBDB1002108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07245a60bd103198b17107c25c3b773269d6c730242695d28ef06455d5af00a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DKBDB1002110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7305b36458be2370a56e05ca1bd23f6f884147eab15a629623629f73108ff22e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DKABA0900793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804c7e16693e192b4c0acb702b4d5f1bbacbd5bf6c7506362a0999e78a777bc8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DKABA0900795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46374868c6858c8d43c1544a8a204539cd9c22031298582ac927cae95653321. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DKABA0900797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4b27cc7642cf557266f6355bc5570efbe9887c1230a331f090cf6f2307f418. 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/USA560655345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50d25eb795e1ee2bb3e43126d5cd2e85693b90b3f6e044d04cfd55ebb3a147d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USA560655347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62470c8f58e2d19034f5b8014c11ecbcf94c6ea4638b5954882555f0d297def1. 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/USA560655348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaacbf549b2dfc7e0fbed576328d4c2a9318862342ce7713e1b60cd71e5cd091d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USA560655349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d6e7025524d11109809e1520399b434438a3d02d014c001f2ae5a8a74c58cb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USA560655351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4559c45811192fe45cd5f64c9936f991898e67d2446aca97c458e6df160dc0. 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/USA560655352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929cd361289bb367fbf44f7dbad6400430684dd2d7dcd237cce902fe628e530a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USA560655355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d7b3df1c6f12d3b4b0ade9741ef00a2441c60a03e7e123ac9c33a3eea5bebb. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USA560655346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6d92c7c59ef95f8588a11852bae1357e68a1ff16077006b70e0784082ca69a. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/USA560655350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c390fcfca002043bde3980cd97c598548a49e4f915a73a92694529b0db3c08b. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/USA560655353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304c80a86ecd3e0878f3cb4f0422598b5144681917ef784f55de00c6e4f469e0. 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/DKADG1500500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f597a34291780262c88191d1d8768e53a1d5c157a735ad3e8e470ac3284e61. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DKABA1103701.