thumb|The southern ridge of the Mt Sylvia Range, a ridge composed of several peaks, viewed from the Lishan area of Taiwan thumb|A mountain ridge from Mount Otensho to Mount Tsubakuro in Japan thumb|T
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 0x9327bbf6390a9613d6b0536cdf4094ff2131723b6a1f9ed55416c68dc9b62c4c. 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/d1b06d05-650b-4bcc-80b4-7a39bc656996.json and https://artists.proofprofile.net/proofs/artist/d1b06d05-650b-4bcc-80b4-7a39bc656996.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 0xd6181d23cc20d92079747f24608dafa9ebd410d237e152d04690d3822f2f98c4. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/TCAHO2305854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b47add13f74e3615ef1121ee65082fe9d11ed2fa40c1d61b16ca1c0c710fe1. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/TCAHO2305855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a20e2d8a8bb419121e1ed54b25bdcccd86456afbdaf3b5ebf221f31ee7d9c07. 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/TCAHO2305875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bff36f1a2f8051b30c070d2ffc06f1ac8405ba209fb98f994a1bac2867e87d. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCAHO2306156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621e72ec4992c91437a0f5cf00c5704ba454651fc5397a804520d2b292ce33e9. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USHM22197150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a028bb554c2d2bde43745c1a5a3757b7f8150f53c48bc0acb3e36ee189e897. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/USHM22279386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49c5e14d326418ca46913cd113f230a33013794a68807f3fe3f66519c506137. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFZ62299003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d3f5e19e6c1dd60d6cce110a777489c1506cc571e057bff30e29838c677386. 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/USHM22279391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc781a2e973725d99a23ab35de0aef3e6136450d7645c341fe042ae1c95918bcf. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM22279392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeaff41a61eba2568a8a1e686192dd3b97a8393e1c54d0be9a21a538dc6fa850. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/USHM22279399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851ca80d7f5772cb7a69991627c095d73ba312af2098bba05f599a580e90c0c3. 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/USHM22279397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa48678751865066caf65a42e11a9c508f2fa6b9f9c9b484fa0de052e429f0f1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWY2183506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02bc666ea7e6069d3c9e869aef4e628f8d9108a434ad0212dbbfcf01404dabe1. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZFZ72307529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca0de389498acae18d9857ce7a3d6f105fabcd8c5fd9579215d147fb53b14ad. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZFZ72307530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebcfe5ca6416114ff91a131553dfa69ff0b44646939189647c1590730cd7ea04. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/TCAHO2303456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbb04406094d29249053ffdd504312ea1368ee8b13f3ee3043dbd4451711f27. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZES92399308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a4d944b5daac7c7bd2d15581911dbf8641ad15c2632f9d88b3410d5e471a7e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZES92399309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c5036012a524a5c1fbe8c76f885565736f4b2b74aaa0f6a269e66e1c200428. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZES92399307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f902daa2ecd7f033ffd79a48bdeb2b778c32f2aa93f634b08bf1771ce6ee13a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZES92399306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f61aff1affa8b5321e9df57ad9f623ca3ee2bd11bd10c7eb740571d6b8b1bc. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZES92399305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36f590bd136fa55b4f2c8e62eb19b8cb8bdd93225873f2f246b262c97843886. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/TCAHX2456873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778d5f4c1d7084c7ca480804be9e3e4a81473f9fedf9921957a6fc3c1a12e6fd. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/TCAIE2432523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64f9defcf9201af3b494ff71762c614ff8eebdaf8e5372633c336c2d6aab731. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/TCAIK2434931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f93980639ec9efc8d93daf633e73ce94dd806a74fc46e8a8558e626a9ab0f6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAIQ2400908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa738dd5459574d13f1b5b672732ec2948ab9dec20e2f1fcd580a013f86730a4a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAIP2400920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ae9b0ba13f67881bde3fc820d1160e6dd5e2535f1dc4f4d65a858f3794ea9a. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAIP2400933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6098cc47b3d2107995097baa1c153a3f39c559438fc82e46def4a8dc351d34a. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/TCAIP2400953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137ef4d23260fa864d263fa92323e254e0723c091966a9a016c119d13d96793b. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/TCAIP2400960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88dd9c164df20a66b5d9ac30a7bba61858d9af1b690c8d2fb575544cd104e46. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAIP2400966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8225021350ff76d98d50da39a41632d21937380ded6801c01a87f077ef67f44. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAIW2422879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656bbf0998c7de9dba2277eca1bd89f6e085f29a3562fc9745fd2ffe262615e3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJB2412574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc39efa935e11b22226cd858c867857dcde9ba39a70823b507e7c3fdb7daa06. 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/QZPEW2584692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bc17c38ac2bd3c04cf752e6bced296f1a7468e20c1c3be4b97c8c51636cbdd. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/TCAJN2543403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b79285a585a058a983014f06592712a8a023ed659c91e11b3d5c34ad03d516. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAJP2563160.