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 0x45558caed0220616d92c80422ed4bb1e079397b4edfa239eb8b88a14f84a95c6. 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/c6d05cfe-f90a-4313-8694-c68d13bcc27a.json and https://artists.proofprofile.net/proofs/artist/c6d05cfe-f90a-4313-8694-c68d13bcc27a.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 0x336aea5693dfa96c43d8330890fb1f32bcdc6e6073e2c1179a6a0716e158f65a. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:36:16Z), 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/CH7812354046.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a5103e778f1f790f19a707d2f892202dd95cb9b2f8f2c37bdb7522de75856c. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CH7812411888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb739221966eda5c5758dbd1e93e56a88293f55cf0aa8e18275d6536a39a976. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CH7812411889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5b2b0e49b96760a903a1b10d59120d04d89abb6ec9bb4cbcc07e4220844ea4. 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/CH7812411890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1afecb505d4b34524c3b2e088d2bc5a30e9e1ef547aa8f74d7645f6fb31dc852. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CH7812411891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc181d9d250d3502de9c8fe5cf29b1b470cef043a2fd34cf24e4dab8958d9eda9. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:32:55Z), 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/CH7812411892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a86c39738b5048de3627b267e07da9a567459865401a410fc9739012c107dfc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CH7812411894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd554b72223618818c49f7b1ef07e8e4b48603d9ee754376676f4ba105609f4. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/CH7812411896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05748a960a8a6643658a4c6a96d2c5b3bd8ed65adf57463e186fbb5f25a437f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CH7812411898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db937ca133f119fe26f458c108bac39e64a72d98d12773d374b7db8f0f3be3e. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:41:30Z), 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/CH7812411899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb404ea0f0edd24b324952fa8fe773955e3eccb7bcd9d75445297126b549c4439. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CH7812412436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd1c977f5fb207f593224f4d8acfc982c3a97916b629ecd1590f761fd5aa537. 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/CH7812412437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde375b66b7135d7f4a38914a58e637a2078b5fe6985e1d85f5b7c6b4d392f306. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CH7812412438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ff7e3e2d278dbe15893580267e64a2a3a77709b42f2f5192d73c6b9440a5c9. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/CH7812412439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3330ceb8e11d0d754dd3428c61c75e00471d516da589e0e221cfc9d9ee30b5d. 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/CH7812412440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dce8bffbd95cf6db3ad247a2c05687de80d3d7ac585811294300671efbaff3b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CH7812412441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19273a8ad1526b8d259c9fa13d52b5c54ee4dfdafdbe7a9688ad215a7f72502c. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/CH7812412442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9052ac65c86dce0dcf22d558af7955dda1e15c6119b8323ead51a8e53e4ce33c. 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/CH7812412443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5713792552d5432647cdc995fd3c87891d0f4c4cd16255d4ce357d2e216cce3. 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/CH7812412444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf019d2ded8a6e88373206be43e5937d28748fc528fb0b5d4050baa92ea11d7d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CH7812412445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c96edc33f99df40acfba4afe1e5d66c2caf9145f6de80cac3e82c8b2fad4ea0. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:23:33Z), 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/CH7812412446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37bfa5f710fe774831dbc368ec8228da4727cefe0deb1d8e3dafa36791b453be. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:23:13Z), 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/CH7812412448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dc6124634500239e090c7e97086a9fd1f52027caacb282976d0f185b0d5be9. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/CH7812412449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57680d2e64114a05377a541ccca774480c400588d281f8a1e9dc95cac77840f1. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T16:04:31Z), 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/CH7812412450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97dbeead21d2b3a5ae51b11f39a99de600d3fc16c7a2abbf9dc5850198d3c94b. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:26:25Z), 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/CH7812412451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf427cc084e18f5934e14d06b6937a7d92c7da2b8852cc0aaff19f55f77050363. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/CH7812412452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a918d1cb43b1f1d09b810f7928e7ad3326ed19f86a569e45a3579d47ba31b6. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:37:03Z), 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/CH7812412453.