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 0xa281eae6f34a6e2e388f0ed0be89f814890d3c72998389903376c9ec4950bc10. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/820b4d3c-5cb0-4232-8551-e4ac620c266a.json and https://artists.proofprofile.net/proofs/artist/820b4d3c-5cb0-4232-8551-e4ac620c266a.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 0x7cc97f61bad50577785409c714eb780fbd3e0b7f09c011a0020f5005a6096204. 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/QZRP52301454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e8edca92084eae5bdb940bed65f98491c34ec0f9a96c23b17e13ee55884ce1. 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/QZTAZ2302421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf341fb60c619b262fb46d9eb84d1edec8b43928515100ef5982f1a4695fc434. 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/QZTAZ2302422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef5fab764acc36c044fb1444c0121a99ba29e0eaa6c7db6835b009a1e67793f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTAU2346568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0546eb106eb07b4cb707b27e044a3921960b0af74035530045cae9b17d8619. 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/QZTAZ2302423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c32761775eb4e1d82bac29cf3d44299bf0d854eefbefa3994d8ddb0538db7b. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTAZ2302424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29fcec933019ed9de55b09d3659f45acf71bd9529594ad49f25522acd8844ad. 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/QZTAZ2302425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59de9f1c6e3f5ebc102a65b271103a41d6d90c3559841c371a51f1dd9547171f. 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/QZTAZ2302426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f24353e4ae95912fa02dd5669b415b775509ef53623dc5e6fa4e4949842d0ba. 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/QZK6H2295027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9762fdb3188a51dac5b199edbe1d5dff7f3c506be07ee8803618e34c537b05. 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/QZK6H2295028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0aa6cc37827f1dd59b1f78e77522d958630dd60cc0f5ee18d83986b556d9ac6. 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/QZK6H2295030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdd6248f395857a3ee602e89f6a50e4921b2656d7101ed956367435c4982042. 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/QZK6H2295031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079fa224c174bc631a11106808dc3322a7c898aa72f85052f2ad7ef13818ac1e. 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/QZK6H2295032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b3cebae4b87dd7cf5ba3a0c39f5034ee57d6d94f455b43a717d0eec8ee13c4. 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/QZK6H2295033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9bfd444b4ea3f33bf20885005d6f7768dde2386dc2037c029de5b5cc4cf28cf. 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/QZK6H2295034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab30be708b07c5f4f7b0f39d57d0f72330323e5b686b98c5751963cde4da3f00. 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/QZK6H2295035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0bbb4598df012742cf7b948b49d208df002f9e16efe1010ff0bb2938948092b. 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/QZK6H2295037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc97f61bad50577785409c714eb780fbd3e0b7f09c011a0020f5005a6096204. 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/QZRP52301454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50eb9f60102b21c57172fd2dd8675048a1b09c3a616b49059ea053b85e8c8a68. 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/QZFZ31987574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedab969cdc2b4590a4ca47952752acd42c7ff69eea00bc0fbd745c2724a53b79. 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/QZFZ31987578.