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 0x2f4b2604c264e029836e02e954fdedf8026092fd5f36ce2fa69695576c52a87e. 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/6c556b3a-2471-4192-b38e-21745d71b26d.json and https://artists.proofprofile.net/proofs/artist/6c556b3a-2471-4192-b38e-21745d71b26d.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 0xfc38ef53da7686d73568c3653ffaf3cc41d8abe7f78a53bcbaab2ef68f16c4cb. 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/TCADR1838920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11770355e72070493966cb3604e406f1c474a9e600c1be858428411b5ccb6d5. 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/TCADR1838921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0482af5dfcfbf4902ca0f6a421100bb6f8c9c3327324d8f878a69097b7453060. 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/TCADR1838923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719f5d051a53778216612821c29e3d78cc2d0963c836ca5a9966552d6978b924. 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/TCADR1838924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c2653f57096ffccbca375249d8e5923f6020c00fe46dc4783de22755e0fda6. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/USCCW1611213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d64416005f33581c627cb1179f7d1e35def2d3470b861a2b89fef879254a2a8. 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/CLKT22204259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544cb79fb184ed4676d8f805871cdff0aa24375ed5f800981470efe25a74096d. 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/TCAEF1994421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5855f18413269e694f07ec95083372c7318fe92f97b2721c222987215f08ab44. 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/USCCW1611218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa5530f738048e2eee04c0f95cd627b2ca5c64ec8eaa7f06fd4617090564b86. 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/USCCW1610655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc42c6c3fc1487e50021d7a0928c5bc95f99c8690fcd71144a9a026561cab606. 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/USCCW1610658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f719ceedb6122611b992dbfaec272bcd2f07081dc564f7d1c29bd8e86b88ff. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/QMPKX1774025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e0322dc7ea3cd9d448119cc40d6a2c7f51205f89250da523cf5c2412d795c7. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NL1JL1900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004934121afad52ff56a5530af417320a31d26d029695d3a5847fc1315404a1c. 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/DKAZ72122503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004934121afad52ff56a5530af417320a31d26d029695d3a5847fc1315404a1c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DKAZ72122503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004934121afad52ff56a5530af417320a31d26d029695d3a5847fc1315404a1c. 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/DKAZ72122503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b30610e2630d9c330efd34bac37c0080cb46d795afc4a0df2d244fa451525da. 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/QMFME2355189.
Vamos a la Luna / La Rueda Que Mueve al Mundo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00aa86cfa96f0709f7b876e615171e1a6d57614021a2cafc205f85b83aa4ae5. 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/AR2MG2000109.