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 0xdc257e80ad0f1069c81ecda86d70931041ba16b20f023709c5657de0fbd9be90. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/908a671d-95f6-45bb-9d03-db2ed4922e5a.json and https://artists.proofprofile.net/proofs/artist/908a671d-95f6-45bb-9d03-db2ed4922e5a.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 0x0660fe6ff0f72adeedf72d767bef7a72c01a630f57e861f55272c90deb258336. 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/QZ4431800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9771f59c33a7b3ca84ce238260e59e276daaf3529bf4dec68c42ce36b55ade46. 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/QZ4431800051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0660fe6ff0f72adeedf72d767bef7a72c01a630f57e861f55272c90deb258336. 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/QZ4431800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d450b386a15cb8e5910a55f6ec578fcfb36aa79d4b316599d42b08583846e1. 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/FR2X42251968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27bcb0a359a2c9e848d3ff78f6cf70f6a0e1aef10b4d1decde3dca4099a8119. 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/FR2X42271597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2826dd129ab46c109438f1671961d94069b67f5dc1f44154a963adf68913f6bc. 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/FR2X42271598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa265b60c31199d7818428ccfc274e15be30be7ecfa6a286b4fb0fecac3b15f39. 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/FR2X42271599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2006c7a0165e064953910eb19e97394350f079033c4c82d48d82a2eb5a6e6d51. 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/FR2X42271600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8177d3eeb09cadd603bef2a527166897013f3a8aee5bdfeb22764fc4f376049d. 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/FR2X42271601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4bf8f67d76c748c405481f4bc17229e18854ac5b11dd7fda1d652fc685af71e. 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/FR2X42271602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce05a827042d83e66f265e571a225a1b4ddffb7fbea465b66b2a7eb68e01895. 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/FR2X42271603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee0c25b5d196433518a8381c1c4b13a575ccaecaa5193a7b8367a274522f70c. 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/QZHN62027531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8896e922fe4ab335f7bc7859b443b8b8402e5a04afca14077b38249a53093ca1. 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/QZHN62027532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f80609b4837d5e7bdcf02462d3d695eb739bc9b35ae83323683a5734772c32. 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/QZHN62027533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9638bc68a462238a67c4abfb242f522c09e5b0aaa0f8ef53326f3d46b1be863a. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T17:25:38Z), 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/QZHN62027534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbc872c1385a33fb0b86a1ee11e12df48637262afd0750483aa5e9e54af1fd5. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZHN62027535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7089d4b3649801c2b51a8190386eb4f94280a0b3d450e7d85a2c77cf460a8862. 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/QZHN62027538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef0f599b1e548d4894fb1d2dbbe74d1c5a589720cb2c4363dff2391e981996a. 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/QZHN62027539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e0483aeb8504ccf1a43a200e76707a646098ef7164e760ee076c23f61b2be6. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZHN62027540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ec20ddf0bdb8ec98469c2c3f2311655577395d7e6752f527dcb8d5540e1269. 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/QZHN62027542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d60903a9cb066c90fbf79f80ad6ce0ef10cffc8c2f007da20b348995eab4393. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZHN62027543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edf50d8044fde30248d4af161023e5b7f94971745ed90758d155d4c159ca294. 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/USDY41902497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5356a5e6850ce85aef7082b24d53374a3d0bd00a5610e8c30385ba4deaf46dd4. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/USDY41902515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2ca7291fbc0c3a7b65ca311144b2b59111f7e40fd8b4fabca3b822de2b8921. 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/USDY41902553.