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 0xaa79abb21d727806df08814f48f6c4ff45589ea728e8fa683cb21b293f3feb6a. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff3aa09f-2bb0-4f85-9999-1a14f76c95ef.json and https://artists.proofprofile.net/proofs/artist/ff3aa09f-2bb0-4f85-9999-1a14f76c95ef.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 0xac9e0e097a232f6dc035d64f8de5158144274f0eef014a85c6ea450dfec1e195. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZZ782518340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9793832cde98f01ad107c2360ea0415d4a9f3226a7b72b9211903f5017df90e7. 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/QZZ7P2542880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda821881d0be953c117da0da341e88c07e4f79b3cec7e5a6f80ad41c12c95c9. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZZ7P2542807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501c6e609a9cedaeb52a85a1f5fc565d86c7dfd25382d047cf41af81ae21e03b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:39:01Z), 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/QZZ7P2544950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7453030e286b7c4ea1f9407973fcd3546e067e8080d10128a5eb67bf6899e8d8. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZZ7R2574932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05283562df1cb533c138aaf368a31cd970aeda276b3046345f008c6de86b7c0b. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:35:20Z), 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/QZZ7R2577429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc451ae0035cd208c15e46f72274833422ed0f7dd09a21d7fc9ce9c947dc2c1c3. 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/QZZ7R2577431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0061342cb87fe3fb966b29d78b6c934c9f4b9cd1ff6b36d94bf0b8c2da84bee. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZZ7R2577428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b0f8379cdf55479a627188207a4833b658760e2b8ebb2b205b35a84c03d6a8. 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/QZZ7S2527981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bac74b176da690c8232b4b79fdde0a206c6cd38e7b1f11060d02166c876413a. 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/QZZ7S2531484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2043792dec4ac34bd8bdf2fedf8c15d71b84f8cf3286e2054c3f7fb9079afd3e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZZ7S2544784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa904172d9f460ad1ddae7d9f26cc63ffc20aec85fe3bbd71f7aabe17b9cf9c81. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZZ7T2520305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c71157af6d10c7d8b994a6efa36d4b476d8bbc2dccbc46e56c141b524c2d2ac. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZZ7T2520343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231364b5fa02673ee98c49c9aa55ed4bea5359f36d8cc7b46ceb758335475a69. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZZ7T2518183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb263303f95939890060f4d450630d997beb544037ad05339fddbfc2b75ce879. 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/QZZ7T2518260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfe48bd3c5d25f9b3301b98fac6f7f67767d6862c696673987d8a740c676395. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZZ7T2520297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190276a200b2c22a9116605410e7904fe12d86f655bc0b5987f149514764fc22. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZZ7U2521175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3424286586fb4d0a150dfc8d485ee3f2ce6d89cf66e1dd565a112560e54da670. 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/QZZ7U2521191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09bf9c6b68c3f65abe2f1ec51534f3c1969f02629c641ba509b3a5bc4a0c66fd. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZZ7U2573129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0e07816eb23e65bbb0a4282612c1677384d1f350e82793552a6a325c949e82. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT3EY2541080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603ad064403142fbeddc33d2e4511330409c6c485ff98c8d03d2ee9660f08d0e. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:57:09Z), 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/QT3EY2541066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d2ea0ca8ee0a81636c777f08c1d7412e56ef4c42917202d1c3daab275c6174. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:58:19Z), 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/QT3EY2538429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276c1d45d80df79e408fde3a47b048763e83e2093d95981a62429166896ee30c. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:22:14Z), 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/QT3F42522255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3faa7870e95eb1e569fe9e4f8cf24261069a078e4a4b2c3e3ef369b4df796a. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QT3F42524516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b3b11dcfbb264ba3d15ee30475aded36a625547a1077489fe938f540b3e094. 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/QT3F62542739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243dfd06172ccc48f40775b175a5b0ae1610b608124b9117ea7dfa8adef78aa5. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:48:08Z), 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/QT3FB2502741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d78bce0cf300cb5e134cba2d8c66bfdcf00ad3d0bfe4e9cb6485fd362dad14. 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/QT3FB2504538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458d930cc82bf4ec88f46a89870768dc39407471fc1263874eb1926c004a5e70. 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/QT3FB2504539.