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 0x26fe8d349927e878605de53df2249b0487b395878320ac17511e3c687fb2d4e1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b11da00-213e-4fe2-814c-fa0ea6acfafd.json and https://artists.proofprofile.net/proofs/artist/8b11da00-213e-4fe2-814c-fa0ea6acfafd.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 0xdc2fbb95135d94aa2a97ce4be90b0f32ca3714aa0d5f6bf2baa1584a06037f72. 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/BKCHO2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc463a2b4e83efde0a13612f839a1ed99ae97d56c986a0c2fe514e6ac754657d3. 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/BXSSW2400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f442eeae0d9e0987b958dedc8cf8d834ccf0a1e6960f9b9e7ca92ed634c2585. 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/BXSSW2400053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f37a2a3be38f81fd55f6b4e6bd6378b9fadeb403c8dcab11e76df250887699d. 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/BXSSW2400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0816387abb11ba7429f576976694758479b2605a80861dec59bdb9b707f03c7c. 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/BXSSW2400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6b10791778fc854d4d874ebe35f9f75343ea4d3e7d1d3d43a71409ac6d9f65. 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/BXSSW2400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290192f90948fc5d140620394773aa75fab18fe582e6c721e531693ce380b9dc. 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/BKCHO2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114057c190de14a3552b9d7396cc5dfba811e03b9529d79b7ea1ec688a53fc66. 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/BKCHO2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a6b778e24e020451397ce10eee05c8216121b01729fad183b54ce57f247ef7. 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/BKCHO2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad87af4ca74ec0ce6391fc895ece529bf8b36fa884fd1d732c09a5eccf96cfba. 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/BKCHO2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb188e720babe96f91a792e325b0f20a947dca47fa428933b7f26dc9588d2cf. 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/BKCHO2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fbe2cfe0c1d607a2467b2edec01b9ea77b398224bda762853499b7f8486417. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/BKCHO2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b98cfd5b78b7a29e763fc7141200e678160a00ecb74b49707dd284361f2e812. 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/BKCHO2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050547d65ee87de2387d2f3e926c84b70064b7a860ae372f020830aa21b3aa47. 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/BKCHO2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d4d0f829d19a01249f9bdf0e3351a9bb0102ce1b26cf02fd6a6795e6e233dd. 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/BKCHO2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85c8f526788532dd0467fee4741653530bf32a95e45635ade63b8c2c4c1570d. 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/BXAQ22100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eccb5dc9e3d5a1f4a97333cc523c71ff2bfd225e41604ad94a330c356a87da1. 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/BXAQ22100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcf39cbecd49f38000cbdce9aa6e5b28891d0e67a5171b6912c1b8bf2d2076b. 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/BXAQ22100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eccb5dc9e3d5a1f4a97333cc523c71ff2bfd225e41604ad94a330c356a87da1. 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/BXAQ22100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d52884f5790f20ebb302bf4787083abe06af12b37d9c507519f9a234eefd89. 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/BXAQ22100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b72e6a787f8f354bbc5c12ca6f2b39b207834fbf8e9d4fbbaa3a5bc2d87b408. 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/BXAQ22000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6841503c8dae782a684be96b943857cd25c0429fb4945507ace0cdc7bc4ff5b5. 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/BRUM72003658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfb986a87f85f034d121b83225701e7b0db5987f5f712e2376f661b33a4f23a. 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/BRUM72003494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b70ac9672332ec4d6c4892a9d66ebb818d5b2818d34ab8dd9e52ee69bf4d4f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BXAQ22000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdfeac5ab93e163451a9babb3a56069d95740aa01ce54476954ac71adc0b018. 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/QZHZ51927579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62233cc0d949d699370ea71fc42051f6d486a2d72695779981b07135b551eb6a. 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/BXP3V1900001.