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 0xacdadf4328334cbad9d22bc90dbe2006a02158e50849cee7d5b3dd25f59882be. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4879af5a-eb8e-4b5d-b136-51c98fdf54df.json and https://artists.proofprofile.net/proofs/artist/4879af5a-eb8e-4b5d-b136-51c98fdf54df.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 0x127901c1088639955ebd019d968989d5cccbbe4b7ecd9bbe4af6bae9655db576. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QMBZ91912843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20445076cb3f432298452a767a229b064e2a5bb86e2214f0d48ec30a11d34dd. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QMBZ91912845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698a626b7e2096298dc98afafa490107ced71c90e255f8ad835defadad122ec0. 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/QMBZ91912846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a2d81e66a0c40623052ccb69335b21b3a30260699e5f4bdc7299e63f3b8917. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QMBZ91912849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe316374d1c20160ac76672749336de412ee052e177becef0dd5a242932a9e71d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QMBZ91912792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b61632abe1d3f469433d4d394c025fe53707b61db75c6574b4e9f692f7caba7. 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/QMBZ91912793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7691f3c097497ad01253d1b99f9792a7c66ae3e283b0ba80d2c882bde63bc35. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QMBZ91912795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93639fc339f64d5aac9231b67274e041507afd62c9ba5bf721e5077bdbfb3cd3. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/QMBZ91912796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa575ed16c0d916424df3701bae756ae516fa1021e05e7959c9a3b16ee7d2fb78. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QMBZ91912798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c27f02cb076b4c2ed048fd057f55b776242aa61859b55bb9ab130c4887a843f. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QMBZ91912802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67821188f31d1f9bdb7b06a6a8659a2ed6825281009758c492c4719bbd2c9179. 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/QMBZ91907647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6d90e17e11dcf1817b8fc4da7b1a7284d1bfdd4aeecf14df729a42de434e67. 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/QMBZ91907645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e9a14936e21308d614ce866b48a8485537bf734e4ddeb824388476dbe4e9bc. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QMBZ91907642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047f10aa45c7059b462a5c4c74d46b4b16915ad44bf11a42249a072b71377e51. 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/QM7281989435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8cb35728459995383820743a45533ecd3559743ebba8a1a7103ec2d1ede6dbf. 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/QM7281989436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae85867d56e5a998b6b463318edeefaccb113b8b8a76cdf768e1ef2550ed2027. 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/QM7281989440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f5442161603d1dd7576a07afa5357d20cecdc99e6ecfffa2701784de8a33b0. 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/QM7281989441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c6cc0778d7fe7c66be16d1973a38aee1628fd51f6ed4e6ba31a275c1979a87. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QM7281989442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62030d6d5452cf3bf37430ed4912f1697d505b0238fcc99d87400ca46d1d225d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM7281989443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fdb24554e31c31ad8d893cf633171bee648c0bd14e7f6c3f569d8e6fc7f3575. 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/QM7281989444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc1cd3413188fa74721c6bfeaaa979c76f87028c208a1ff370b6a762bd4c0e1. 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/QM7281989445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1a001b0ba0dbdc147ee723289f6fd17c21cb7e1c8339d5fcf2b74a48e772f9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM7281989446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf9e884ce1a3538847761bd4e6477d34131834786b6ad1ee2f0192b455507ae. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM7281989447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe4ca887bae6543ffda0d7b1c417e2bbe56c3caf8100c5058f33e3a08c28803. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QM7281989448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228fae5f56f88e025cc1aec1cc556fb3f3caae0ea5c48690c12044a53036d94b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM4TX2022371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d92bb9ebc033aafbd25d85e9aa2093bd99cde72cbafee685618f0a4052cd81a. 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/GRSTY2100128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ac80ccccfd0c2da6cc9758c46f9b35757f43fc5335df323c11bcc2146fc606. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/GRSTY2100132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b5156377f7446592751127f5d3cbe3c27274ce6ee0e2247dd2325dfdd9dc68. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/GRSTY2100138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd2c09430a51c868f6c92b06109f8d6ef026ba49bc552f7c27f28aaa58b9eae. 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/GRSTY2202081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95c32959e50553401c7f32d74b39b5ef055ecadb0dbb104e95508ece58739c9. 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/CH6542212329.