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 0xa6a4346487d55ad0eb2a0be44422898b9ccc2c78911868af0898473c0511514b. 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/b1e54062-e18a-45da-92a1-3c2f51db3ffd.json and https://artists.proofprofile.net/proofs/artist/b1e54062-e18a-45da-92a1-3c2f51db3ffd.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 0x220777945997afacf4d011741c902c2b196262c140aa77418e633811feb8dc55. 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/AUGBT2354121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2e6ead293fcf81ebd813bfcf8751d8b59dcf01c5f989b8062a606942de65e0. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QM6MZ2485076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ffba8b2c4d1fe52a07f23f1ad6c6cfdb1bdb147edb41902eeeddbae6b913d4. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QM6N22430846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040cf3988c7a5ca0decb39947459e39df5944dd7b58ee81c30a67d3950736256. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QM6N22430847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc961b682174eda5853c1e0b2886d25aad26b8db1e3547769d87a08a31868311d. 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/QM6N22430812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3b5353167be93e707acc6b4ce2075d03cb624dfcf78143c04ef5aed55b1b1a. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QM6N22430813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4737284b60ec26fd6398972530927386e8b3d4c84f74a9130df1e4e8b5b30a. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QM6N22430814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39d6399ea6611111aaedaeae50f1b0e401c828df566098ce0984d46f965ce35. 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/USANG2428811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f820dd506414d6b6bd0ebe6371578fcd5e37a9ad8d09d73d4da68a2e6dd1f75. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USANG2428812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bec32e5a152ee4e0035912445499cc8d26af79eccc4acd3fa50e05f318be83. 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/USANG2428813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458044559d0586815e1ce638d154782cb29f818de880f009c228ae16a3807d6b. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QMBZ92494767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe76678401d69edd074152a07be337daf9a09699b92ef51e0c6f3353dea025e5. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QMBZ92494768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fd55afa4425cd3335424e6b4dac17e2a5939444b480b5a7e3ea997041cf906. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QMDA72402101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e375ce37b74688930ab29d333cd9331a7f051ffde40432cbc679268dc9d6a9. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QMDA72402102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28601f9ddd678f49cb22876f0caa583e929b605795a6b83d27fab288490a62ee. 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/GXBDT2407552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9351f4d96c53d8854204cadcc2b7e3a82bb0dd50fad146e28327d6454e14d1. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/GXBDT2400903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6517ef6c5f1b0c7766ccb97b3b8822e8b356d93000c8eb4c3de07263416b10b6. 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/CHF282400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6b90a611d99a8b172c583673b9733b8a8296eec63a26b349180fe489f31d1a. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZWFU2577582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff41aa385c50fb133e10a6f2bab2e52c9763475fa4fec754c6bf8a777e1a495. 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/QZWFU2577584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf8d9a550560a29968691d72b29b57e99ed024b15f9b79794db420cfd022b99. 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/QM6P42494883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa076a9103f522232a1a4fcadd09367ab117bb474870b30605b30d302b23cb4. 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/QM6P42494884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3790172dce1321ed7a6f8e4ab75cff013603a070a8ac7b7f1ba449942d8d628a. 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/QM6P42494885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6361a84921f303db2da4325dc8a1a834e020235191fcd30e6369ffd3554b9584. 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/QM6P42494886.