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 0xd3d61b9a3fcfcc3407a607ba0f5eedcc9323b72cef8e613a7d6a4ac475396578. Chain 2 (Bitcoin): anchored in block 953968 (2026-06-16T16:01:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28c099f6-e1bd-4a37-b701-7df96cd6d698.json and https://artists.proofprofile.net/proofs/artist/28c099f6-e1bd-4a37-b701-7df96cd6d698.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 0x06d55f6e4c05bc12c4b86f18485216135411ef3aab38eb135858392efc447245. 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/BKLZF2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2615ad271146afc514005a51e058d089ba2ddb97bc2bc8c66ae9b6a3d7549d7. 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/BKLZF2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52516866357c3dec1f9743f00e700e19662419d67785c3057c08cd494c443260. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BKLZF2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11d78fa715dd4bc7c69daee19a275e84281b83d8cb8261bfec6921994a54b2a. 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/BKLZF2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbdae705ad01b72648ddef889530c885d1174af25bce7a296843cb009ae0e48. 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/BKLZF2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25bafb729c2d3dfa6006686a680332df8765e6ee2e3d55b3b92d4b440732d936. 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/BKLZF2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75714e4bab8407754a64cfbae9ff5a8efdd5c49057f30a023e194210f68296d. 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/BKLZF2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8c725df2f65e322c9a322ec7daf4df9501741a1a1370238d0c73609830c956. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BKLZF2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a95c33026706886e772c32a5e0fd8e18da78339dc96c736a6bb8606c7ae0df. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/BKLZF2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925f0440a570a92cbc1ae9d4eb096dfedc5afa3072128c795eb65c398f33da0e. 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/BKLZF2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9bc55ba968445dadcf6ce30fbeb3ef0656ad8ef9961226c5871230348d0c54d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BKLZF2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c46c999c59f554bad61c750c26562b26b81f8b76f07f1c4914f954a170c8c4. 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/BKLZF2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66df47336793184cf020acd1bf6370101f71734f200f46006ea394d4825e63bf. 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/QZNJX2493880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafbfac0b96f15763907e5ec6a5faf703a092ebfdf1811d11ab2cdc1a27f243c. 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/QZNJX2493881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef65dac0f37763cc1666f03c334bb15cfe735859ee38ceb48703d138c6c6b93. 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/QZNJX2493882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa674ba24348f7e3c728daab5dbb3c52e81465bf8cf8a8a5413e10da7e3c71979. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZNJX2493879.
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 0xf9c41e26db694a4dd8174fde50022db74c9e5ad7656e6d92f78ddf397baeefa9. 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/QZNJY2209147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d80ad192c7efa549c4fc68f98a205f032239ad4171389a02c81c7d3ced881e. 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/QZW9M2319739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886d1c549ef81a169f490108fd3dddd69b9b5fdfad24c770a7c01b3c193ae701. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZW9M2319738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9200d65c546a62fddbd77c01b397cdd1e430fa7d1eb2bf730083843ccedace0. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZW9M2319740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3259190200a4b9e9e72ed5c3a8724780a2fe9ea772b74300f9450b15418064. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BKHPM2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dec98d6f7f4f3729b5b7edb234f67bace7c081c764c9d6f32d01ceb8c4021f2. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BKHPM2500010.