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 0x3443db375795d32f45be4d67d769652d80fddc9d88224870c0817b1b37954d24. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc80a583-78f7-43d8-b661-392c9e8cc47d.json and https://artists.proofprofile.net/proofs/artist/dc80a583-78f7-43d8-b661-392c9e8cc47d.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 0xd49ecc12698ddf29376f9283c2edd57f75489b3b03e5ce578c870f60401060dc. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/GXD7G2535547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c175573f682014ce9df1d7963b31e0b188a68fdfa8533b212b81b9a45c550a8. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/GXD7G2535741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2530bb67bab4930ceabfd94df1a69cb4f456cb80fc167f44b33c61cc5e5f71ef. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/GXD7G2590998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adb393f6b522f028c4a577701d93bf5575fd4f97a9e30c41baed1c5fa7ce929. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/GXD7G2548822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa947bbdd10136e4ed0af18e2460db2a7f48acf3a6aaa66c80363360a1871fa. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/GXD7G2502768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b436ecd5fbf2363af52e47d99c99e442636efaafe2f1e0bf074730981fa6811. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/GXD7G2516843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad64223f8e33e081179d39ec6ca7b137b74da1ed52f7ac9e819f82f99e00977b. 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/GXD7G2558441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2126ac899a34f002761591401b433d36a6c080686ec887aa6b970d835e3399. 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/GXD7G2527875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df20a76ec443f5eedc0afb12fa3cb67cd4bfa8308517812d612a3deadb725b7. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/GXD7G2598574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2acb1e5774f3720fa92e58f64fe937ab6b71f07179dea706629321dcb4de288. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/GXD7G2533999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943a2273901755fcf22bc1776944d46ad00bed8bcf7976a4870246a5d9037664. 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/GXD7G2579279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1243c9bcb750c5fb119fc0b40ee62c51b180c5a17ac6e6e3a84e2de98eb698. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GXD7G2532301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608dc685eeb4464807a3d065ad49340391c568ff3bb67d79290ef1c353ba9474. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/GXD7G2547125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f12b527c09fa204056fffe93338bf24520268a6bf752c9f4a8b45a28a99fe2. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/GXD7G2525259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc747f566bcafcafe3cbe2323e0ce8f694630ccbd60a7daebe446f4dee645c9ac. 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/GXD7G2530628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9660d86a6ed5b6ae3b3f8c95a4cf88737814f692271bec712b9ff44d887911ac. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GXD7G2597222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ae4b72407150e59e7b99da87e5c71bf6f7f4325b9ce000ac5d4b5261343338. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GXD7G2551329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572c20d55bb0c829c53dbaaa864a93b54902809fdc7ebb40d51a6ba90e840085. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/GXD7G2517780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1969cd6102eefe09fbd20ca971cc1b29b76caaa0e48968a966e6180fec99c3. 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/GXD7G2562053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554bb5d5cc883564bfdac9a84f36ffc2c4e6378cbc72f4449237795d911d0977. 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/GXD7G2516789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c4a3dceebab7c05eecd3861b12242ca655a564fe593b5d8f62cb4e8a5fde55. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/AEA3A2587646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058229b9fdc717d586d9b14a6b635f21c5f046d22b20c2b9cb6d2977398c1c19. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/GXBAV2106864.