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 0x7e99893aa2f96fc1ce427e3859f49bdfaa8f6045002d8704693de2f5a06d44a4. 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/a16837e2-1eb2-4d45-91ef-e6197b06e1cd.json and https://artists.proofprofile.net/proofs/artist/a16837e2-1eb2-4d45-91ef-e6197b06e1cd.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 0xc65d13cda182f5fbfb6383ef8ceaf79ad90183ef2d573d5f977814e185cefa42. 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/NLS6R1705484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0825974ae4e6250f0424d50220be1fdacb8d0aa59731e1fd44eea1e4b526fe4c. 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/FR10S1938489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df17500aec693cb7070148fa615fb801a494e17310ddf716aabb938bb0cf7f9. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/FR59R1906577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa26e99044d4d6b4663b03be709ebec3420322b52deb1ac1873ce1f3b617bfb6. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:26:18Z), 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/FR96X1916453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89ee0770594fb14f0265bd7ecb60697f794dd598f4d8462aa6d24fb0a3272be. 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/FR9W11929069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe985d75b6d52f39eb511788c55b33cdc51880de22e20a9749f61363c96de2231. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QT3EY2428052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6d89d888c016045f0ec9d9171c5d5a2eea863adb7f81cd96b4878b3bbc17cf. 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/QT3EX2405577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01c58518347f3105c3389946df65989ea5fa9688c858650fde4a424c9894ebc. 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/QZES62539024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb190cde9c83a58c618e1cddcdde9ce2ad5a55de0aa8eded1992f1d6cac112ec. 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/QZK6F2591666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c909825ba6406065bff0e8d2f0a21efb9065e6ee712c3cf6a8826161b260115. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZNWZ2531032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5c81039f2f086fe1ef2bcbb8feeab790e7874ceb91e3137705e653e5e09c0f. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZNWZ2531033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb54cb5838b2d57f345cebc8907f1b392cbe787175a871bcf25f6b7848541540. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:50:26Z), 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/QZNWZ2531034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6d89d888c016045f0ec9d9171c5d5a2eea863adb7f81cd96b4878b3bbc17cf. 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/QT3EX2405577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7829226a5961f8f425d13953cdcb2cbe99b4897721291c51afe85a81ff2786. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/QZNWZ2531036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb190cde9c83a58c618e1cddcdde9ce2ad5a55de0aa8eded1992f1d6cac112ec. 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/QZK6F2591666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01c58518347f3105c3389946df65989ea5fa9688c858650fde4a424c9894ebc. 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/QZES62539024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d66bc1fc039f02c821e9499d0f38bbc81522a497b753ca3333066ec06bac3f. 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/QZNWZ2531038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9e2ee88544a891c2b1b3e837521a9530cc1535facee1cd30ca403ba1fb08a4. 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/QZWFF2564587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164367f49db26134e6d1ea4e23c8435ef5d0cfcddeded9832f66dfc710dfe2c9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ762558767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9942b48daa6460115a98217cdba5f8ede62d8f35b4ed32459571769a246386a7. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZZ762558768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5480a3be1671eb272c7615163ab11266cb139a217084a27ddda3c0788e65a53. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZWFL2576061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca5f0f7d41c7e2fc07f4b7c996b31f0d12cf1df07f13b48ad2d9619f8a2a719. 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/QZZ762558769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2885c5581a182697240556073feefe9702c7def532606663caaefd105104f66. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZZ762558770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420e3deded7225d441df20dedc531dd66fe4070117f93cb5ef98a2018c0b4b1f. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:11:57Z), 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/QZWFH2598802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b8bb38f67311ffb9a1486edc2c9abdad33cf2b24aaf23d97364a23259d70a2. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:27:49Z), 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/QZZ762558771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb72def1fd8bbebaae2fbdc76b48f07934dc51c76f1d5500b824df91fb60a0c2. 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/QZZ762558772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd150df0e3fb442d13e2b0b734d7b7ff75e484d13f604ffe3fb3b59bdda680d72. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZTB72558571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9e2ee88544a891c2b1b3e837521a9530cc1535facee1cd30ca403ba1fb08a4. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZWFF2564587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004de3ab0d5caf30f1291e44ba42ff5ed944eecf1b5e6bb8935e8b7de9e1eb87. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:30:07Z), 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/QZZ762558773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4895dde8ef22b0a21ae2dea67ac20ce2a3b6e81dd8d79fc9bb8b9bb2d6e01ae. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZZ762558774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa8bfa027d5078f9e79e6d1f1a3e5367d24fb64605a6d7d44a4ec8e285899aa. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR9W12229253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa8bfa027d5078f9e79e6d1f1a3e5367d24fb64605a6d7d44a4ec8e285899aa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR9W12229253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9882130af23b2a63166051974493b55b575fe8acc9ab36858234defab9b5d6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR9W11811361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c98c08102e6536624240f318b99ee03cb8c590d600a3f755b052df8083950c7. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZES82503424.
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