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 0xb3de494fedaacb2c60c1bb19357f018f91b0b71b5b901c0c72e454f42f5873da. 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/a07e3cc4-8b88-4d1e-af5d-48bc522ef760.json and https://artists.proofprofile.net/proofs/artist/a07e3cc4-8b88-4d1e-af5d-48bc522ef760.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 0x41763e1979d2e77958fa533d9d2f498cc9a6fabea5aff95394172f0be4bb06ca. 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/USANG2235564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089aee65eeb74f4a1f8fcded9c2609fd25d5fcd39bf07d4acdd43303e2b5a62c. 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/QM3DF2263297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026ae0e1ffbf8b74e1a0ca27d326acbb89ed515ae03ba6cd026c4a1289230e4d. 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/QM3DF2267442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b87ca11c772fac57205cd2d0c1df44510f3f9ad883d0801993a96913d9df21. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QM3DF2210417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d88c5b51ade52c308485652a398c30ec6212805ebc2a93c7d8c1cd6f64ea17. 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/FR59R2372510.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa88b8d40e43a81fdd05939dcb7618191c329278a68f19115fe7cc04135dcc28. 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/USANG2254058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071f851b88c089b8be3de2ca6c86050444352073a7edcb408edc1d044901bcc3. 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/QZW9M2256900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4c942db3b0b173d5ca6fadeded16c1b68f46bbfe54fe761a70f8081d37584c. 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/USANG2236219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87d0abd8bec5e988d690d72ea9091fbc763e70c0575895f367f24a2da415699. 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/USUM72211367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfbaef13eb9a20bca3814440131f5c4bc525b2e40f5260568938b0849de6c34. 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/USANG2226530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc970644c0039c477ecc8678b209cd81dd9368c692c701c93b35203e66b0e81e. 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/USANG2212235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c324a740b1a8f38dd377ef1fb30df63ff7d8f99e3e0e8b266e4e0f52ee809ac. 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/USANG2208656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaed718ec507523cb497ff623d3fa9fb6924d528ddc92068b289c1622d60dee6. 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/US3DF2296738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca5ef2d899792d120dd11bac701e66a1031ad83cf23a4d1d8d1359e84abb8fe. 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/US3DF2268591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf772b9145c57228a8dfb939c2dd9d944f258ff51ed0f24d61b1cd7cfc839786. 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/QZNJV2282231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857cd2c7272d90a37f2416087ec866b85b1565f2174347292b98edb5e15e8851. 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/US3DF2250671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37ff28fc7bd08f3c689f8c4728d0e62ef4fab5c0c0a19b6d9f35f093beed5fd. 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/US3DF2239165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfddc48bbfb1f811471c3c3f5dae60cbd98712df2873694095651e6653e5d4be. 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/US3DF2228168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33333bd31711171e60bc7a7e1a9041299109c30a43f455fbc8f7f45f72d29b04. 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/QM3DF2192429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf167ec23becf101a3c755f22a6c344cfd033d1a451890cce0c7db67b844334. 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/QZGLM2202611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca4f0ccd16c196f70f3474e7b7f541b8837ab4c2ca210a66e4ef3a4bc63dbb6. 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/QZNJZ2206584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c5c60bd857942974abb9cdc51910414a70d01a9bef28f068e38ad141df6f8c. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZNJZ2206591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadc49e625698089bf68bd70ce60760fdab7b52885f53a627ba6003ca4b5ffea. 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/QZW9L2224764.