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 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 0xb8c7e03849595b3305dcca5416da220a98d44bb72260704848da51d5e92525f9. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17e6704b-83fd-4204-b308-b6bb3ba47879.json and https://artists.proofprofile.net/proofs/artist/17e6704b-83fd-4204-b308-b6bb3ba47879.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 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 0x7fb17c177f5402e89dea73d8068cf61493f46158c097c9b3d67841965f3335b4. 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/USA2P2144598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0474954adddc4f3f1ea009a6b265f85ccca313e7229ac5e9e3d6a05375809f6b. 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/TRBGZ2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351332dc29f77c44118b8f6ac69f45db77b8fa2919733444093eb90de94f5988. 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/TRBGZ2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3552b9fd91b3a97f74946fd1be3fde2a472b0ff678f7169f644922b9198ed51. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TRBGZ2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6bc8e6916416c86f9eb425e190dac70ec4d3a83b9ed8e0a8b52acbacb3eaad. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TRBGZ2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa79e1f40942b85ba0b009b5be9b6f86c9e0d00d3511c2bca967a6a92dd05486. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USA2P2421279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432ae4c97e5c0fd30550ddc8fad88716a4a3e5d1f421d7f9c38c56b6c36b1abb. 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/TRUM72300229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51122fbd1c34f478134f6d4a9fbf9cee00cc5be29e7e117508990e55c60d52d5. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZK6K2230527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa5f9a446299bfa88f9a2649bb786a0e3e0bf88d9b671a5bdf2959011d0c010. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USA2P2144595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341f6b9da537c07e031eb3bf8de625ae478590422994a485d6965f26f5bebc8b. 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/QZNWZ2007925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27649581bddee895cdf2a7612e3f869f5a81ba399ebdb8f49ab6873377d4e60. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZK6J2088220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46de61815dab81625eb56a843539ec42cbbf10aef0c37a0f09af79f086f7cf98. 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/QZFZ61930466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7d9409bfe7fac3bbff960a90af95bd121d62b8fc17549d496f8c859ca13ce7. 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/TRUM72300077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c23302e9ad38ed0fca1709a1859f3ba855d27c9b0aa237463c5df385aa295a. 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/TRUM72300080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2c4eab8fef049758f4d1464d97865b24cf943fa5cbc7aede20a4f4b805bb6a. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/TRUM72300213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edd4d6fb04bdf06492ebf22dc206dff0887dea651edf8f6f4127a501f6f2831. 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/TRUM72300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c473cb7dd593d6fe231b11165dcaf6932dc6adb1d0fbf787a334b1a087a5a1. 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/TRUM72200967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a54a8b284c9ef76365fb5c0f62258a580f88a823487170e15058a550e2bc73d. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USLD91724449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d995cbce6467c04560dded6d7906bf0190a9103dec8766b1340135a5760c822. 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/USLD91724452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bcbe3c1c862a4cfafb37dc295eefbe9d380e67a09e28466257b5abcb644f05a. 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/USLD91724453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2972d692a02bf35a371611f4ede414b4ae3489d0697419cd3e0a96f9bb1bf7. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USLD91724454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1cf5ad04c7ce87694041f74c23485e1818980cc9112d2ffd20346ef1de1ed1. 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/TR0532315379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c23302e9ad38ed0fca1709a1859f3ba855d27c9b0aa237463c5df385aa295a. 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/TRUM72300080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8121a17ef95a2e7ff8640d42d957c62ab7a747b2d1c1abf030a0538e23f5591. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/USA2P2204586.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d292f2fb268a2fabfeb497271056494f81c6f5d03dce08b1782d03242f09d96. 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/TRBUR2500201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82437d10144d35fe84806182188cc11b0f65a1ab5e21f00150ffa937575fd913. 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/USA2P2519008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52267d9e880bc291af0290b5d869834688e848ff143d0c0d4b40a7692703399b. 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/USA2P2503305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73da350ad440ad9749fa98e6db99b34e9c3444017676a5faba861d9b32fb0678. 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/QZMHM2448158.