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 0xb76be59312fe890864657bdc6fc2bf355c33aa4c0456880469d6791eb044e94d. 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/5452ddb8-53c2-401d-b95d-47f886f00c5b.json and https://artists.proofprofile.net/proofs/artist/5452ddb8-53c2-401d-b95d-47f886f00c5b.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 0xb25fe122e6f6e517a5e6318dc3919829bc61b19d0963bae0a48aa2898e589273. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZPEW2206721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21268cb83e9ffb16a9859a5c1d521bca803c77133ad4aeed044c98f486f80b98. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZK6G2308155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28cfc778be15565748e1081a7a6bd14d4894be5c8a3bfbfdc856d72b8da2d1a1. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZK6G2308157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b25ee37e9587e9fdd633f1975eec46be18da76872e6ef960283eaa9cc0276c7. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZK6G2308158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c9f02711a4121bd8dd23b131411f27596eef539d72ca2957b211753964b87b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6G2308159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462d229a94855a7f3c5593e348d4e6ab4d3fa3052242c16f6bf339427c511893. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZK6G2308160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fc2f3e4614c7a34abf08400d27ca613aa4818cd48a1c27fb067acd510273f6. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZK6G2308161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a0d8a72ee4ec4bb633979e2606a93043a84a945743b2fbc4f5b6a2015f448b. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZK6G2308165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab35ac35a5dc04963c4532eef4097ebda74037f9e67af9fb27398914771e2307. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZTB72306627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2adda0201e1a9517484f29bf26c12daad6b52c2aa41d1235cd3838799172cb7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTB72306629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11893616b3b581d760c08e8811cc6c157514d401568d17fbbc772834fc5c398a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTB72306631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15e16c95816316ad04522e77c49893e2316601ff653728b70dceff89e8d6797. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZTB72306633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe971469dfc919b39527c3e2e4115d9aac96cf59093cc24a4028e40f3a3045c12. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZTB72306634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b86f375e80836f3651a00b5e4624d727a7a5daeec9b2ab806e6f91c70c20ac. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/QZTB72306637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf9f730990d427f4dc5ffe36d815eaff6d187496adc4aa8b3a0e6d751a962da. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZPEW2208905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32205b9de25ef9731666da42d37c6517e059a15d512567cfd465b15572f7c8dd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZPEW2208906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb10247743ad1c81a26556cb3b47303e37f4355e46f1c805b353145c47ba4be. 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/QZPEW2208907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227575e95957b3b55c9d4eaf81a724e1945b956fdecd14483a9b1f464ff19a81. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZPEW2208909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd68ebb69a65d08da684166c103ee9f68961ca16f01bbac61b33b3c3e4c1ba1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZPEW2208910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf67e48466c1f41a7d9c5ac2189afffd1d021be783acea01792f59af8068f3d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZPEW2208911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f6393c0f8299816bc34592f7d0ac65aa9cc95039f34df0ab40f0b76284ddf8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZPEW2208912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ab1360cbe3a94dfcd381e716d02e128bb64e2d8a026cd6e61384b031e7bdd2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZPEW2208913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc76e3ab9feb0f92bc0fc5336fa730acf3d532e60a000db262cd09410e627129. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QZPEW2208914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95f1c2d6a02b3985456b1edfa040f670049c080229c369d8fed39e4398ecfcf. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZPEW2208915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d840172017aa4e7d2a6c43f8855785d181f0e7513ac65578256ac0b24efec6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZPEW2208916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc219c656bd5272a58b5fadf12fc3ced46972d6898d05e70683b100ab5ac4772b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZPEW2208917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884297ca64ea2aea09ceca2a9680c2cf1d2dc2b9b2c912c51f974b9277f6bfc3. 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/QZPEW2208919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db9fadcbde7879bd6a9b4310bc6668270ddc22f010163ba0d39570d50cc7697. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZPEW2208920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa492942400acc8c4bdbbbb2857c61281e686a0eb12e1f0671d6f29e8ad1242fb. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZPEW2208921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fbad6ebb67f8f5656b701ea17efd79c89786c8fe9b431ac4d62f2ec8c076e74. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZPEW2208922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2f2ed484cc56398fe263d8004301f0aad3a2d73eabaaed3e5aa3f81e6a1c05. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZPEW2208924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02944a1395f4c49f2734f38ec2865f9559ee2bef7031bcdf22007f55ddd0513. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB32412069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda414d278e0dff6dad4a11e73cd3ba119711978e697810f85941febb3166469. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWQ2279915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b8a09f95d13788bf8ea4812cccccbdc88e3b9bbb1a47cef6f99b6f15061b41. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZTB32412059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09465f619d8d7c10fdcadee65a7678d077a0e044835626ca52fdd97f90469114. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZNWQ2279900.