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 0xd283648687f92cdc8a75a526556b21f71d3005009d79b3b2c47a09958d4d3796. 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/9822e1f5-b104-4b76-b7f5-2802d8b601de.json and https://artists.proofprofile.net/proofs/artist/9822e1f5-b104-4b76-b7f5-2802d8b601de.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 0x7644fcb4934d64a5a0176e08f507ccfcce193bbadf87136cccde65e161c3b2a6. 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/USA2P2145062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6e5ee35e5de6a42ae561fe2eb695e3813140edab852753e1d19427b7ff2a3f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:25:17Z), 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/USA2P2145059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84267ca58bf25a951ef04227ead049b949c89c3afa84d81716954105fabbdd72. 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/USA2P2145067.
Desde La Casa De El Amigo De Los Artistas (En Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc993e8f8a059588154edfdf28ad2ab50b4a8d892dc53ba0480a741e7cd202dd6. 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/USA2P2009289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6310c2da292ddb7442d75623a044f84825644c6a3c2a7c6a2d85d97794b7e867. 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/USA2P2009290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b2a55bd6bd39654b5d494f214dd30294f51ba1694cd0ecc2d4a8aaaae5f2a1. 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/USA2P2009292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3945e2ad19824fb1532c67a6a70f120983303e68258dcc17d2b7a753682743. 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/USA2P2009295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefef26376af178f42b876887f01bbcc0f6d9cdc484eabd8aedfa52ac89643a9. 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/QZTVM2389695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7949323576d9be6fdaa27bde7ccc9b21fd04758ab4162f40ca024e7c97c57d4c. 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/QZNJZ2386161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a55658fbd311ac6632e61e4ebe79b8b91cc2470dbd6ade12edad74fbe738c37. 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/TCAGZ2317285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab0ff979479b8d48095a373f50c80ad2574acc6332a083844ef9760f571c232. 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/TCAGQ2298190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8bec68a9f4493df11c30bca7a35865d2430d29d6c22196d47ab8c175f69c2a. 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/TCAGQ2297654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22435ce9e72473f2c28ddc65add96f0420ab01f4842a2cc4115e6875ac5b5be4. 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/TCAGL2219238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142284a543f728ab0123e48f9af8d20ea4c3a0d3da96d4902410b4dd3e44f851. 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/USA2P2107419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc0c57289e73b298a5dea037077e7b31cd647f2584c6461cc37895348f31d5f. 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/USA2P2036356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e4f8722519b0d02f267ff41120e758918d96cdc0026531a84aefc8a7294d16. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCAEP2056114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3db66b25f62125a887f5f33a4f70b61ce3d02b550ed741fc0aed1bbc1ac4bed. 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/QZTVM2409932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff871177efb3443dc705bc345d7e17242a29a821b802c211d1271fb55aff4a3. 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/QZGLS2452276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08b221a877082d6794befffe645c547f1c154ed500869054567c9a11e654b09. 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/QZGLM2460102.