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 0xa8af7a2a281d7ab2e6657021b896eea005b306313eb746717a73bb596f181af2. 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/020ea3a3-5567-42ac-be65-732161dcc6bb.json and https://artists.proofprofile.net/proofs/artist/020ea3a3-5567-42ac-be65-732161dcc6bb.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 0x50a849f8f7f1c15a469e0998eb8a6b9368e7ebf1c4a5af0b45677aabe30ba9a9. 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/QZHN62100741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205eddc6e4d99a10ae0fe51d11de19ab5442a5f061058290c3e64ca0d26b6312. 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/SE6SA2161122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7d110c83fbbe6410e03e1d6cb5a091672792f66aee4da5b9c6570252ad60c1. 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/SE6SA2161585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294a3ae02df899ca2d6da4e1ea12bff6da792037f5b1c27727a101ef39b3e668. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:59:50Z), 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/QZTAS2133714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45700a584ad1eef602ec757d0e1832adb6cd4dd7af801df27e44b23c1e626333. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFZ72260789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72db10f84504a958e7475636bb3e77cadc30a0bf3aa0db3b0f4da1a09360e33a. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZHN42208150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7031e1c6ffb2c0232510bbf8196f0d6fbf24806185d8a802030111bc456df333. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZHN82216404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0bc049f10c67f2ca62b8be1c9d46c5ff664ec4fe3aba5f665616190c03ee2f. 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/QZK6P2269299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9e70b49df7d5b7b80510cfbc6644752cbc15f16158aa0e40ab02e542b82331. 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/QZK6J2229077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc09ab6bd91d6d688be33455d198ac3bbb5c5e1051e5fadb623dd846b9b7dcbd. 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/QZNWV2232916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360603ec03881889e383f580475621dda4add1b8de6c54db4f73a7dff1103ca2. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:35:15Z), 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/QZPLS2262369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2534215eea076ec68a342889f6c98b562b0f35f9cc9c7e6430c51a9edcc2cf1d. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:58:48Z), 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/QZTBA2259823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d27708d258a02aed9f38546621192ced2bffb6a8daf5df125b3f11a29a663f9. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZK6Q2365182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db44a5f34a37927320d3fcdde26a7d02a4ad46ca5910b936923e3724ecbd714. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6F2313384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2113ccec2502e4965afafce49b34dfe125395224719a2de98535f45b9d7d3d7. 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/QZMEN2347354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f397b5f68c306899c752a49347d3cd8b9ddb0026e207a72700ccedaa31dcd4. 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/QZRP52392342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd43a527bcf391536b03c7f6c87c1a2bdf2033c2dbab85d539bdfa37c6fadc4. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZTBE2368808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e63284a6ca266a5fd8b225a4a8181cc6d1a8baae689b9c7e79a78771acc05c8. 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/QZWFM2396619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2745d4064ac9f5e07929c1c4422fa34299eff8c28a489d5fa803a110c4d3e727. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZDA42458732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5093a7f8d34cd69e0c32a85fd713c362b7a8980f93f97e895750d92da5f661. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHN62464597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956b9da9420ce2d7a09b83442d621248bc861570cc585b8b51b7ffe558c31ded. 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/QZRP42447401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324fc1ed09620586cb6751b715cd975d9d9d680ad147f29e4f023d86ac30d1d2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFE2443290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6e570eb6ee1c613ceb1c325b67f0957ae9b4e6815fc885f3b99684a081524c. 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/QZWFM2447769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461956d9c97ec2f983b2ae7424fe4b4f1929c41332010a95e9b956e4d87c47d5. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZFZ62511992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced834a7cf3986c9a27175e55e3fa28e2a23a2504986b44c76991901973d581b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6Q2590804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0f269887a87775b4ab0cad1ae15c8c2493829172eb2341fac77d6c2e77a668. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:40:57Z), 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/QZZ7P2549465.