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 0xcd3ae42dae50bc6c40ae98bf855fda4e197773856aaa78e51dc639104477ba5f. 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/a2903aa2-7ad8-467f-b47a-fe9dc190ca2f.json and https://artists.proofprofile.net/proofs/artist/a2903aa2-7ad8-467f-b47a-fe9dc190ca2f.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 0xbdcc0a7f412717da8b258757c50552e5195ccba8aef7e411a15eeabb990f68ac. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/SEYOK1700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a56425494fe49864da8549629652cef98ed67c8be6276e4d527b1a0c4738fc. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/SEYOK1600161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea48982a55db817d9c02e754aafc2f2e25aef1364c8894f3bb62331e15c4679. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/SEYOK1600166.
El Regreso De Las Buenas Épocas (En Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb569e04df0712688d698fc9199952123a27ca869585a2a55a980c920d4c4a2f2. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/SEYOK1611897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577729c2d34ef655d43e390804e3d863217690526a49270f42899b701c5297dd. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:57:35Z), 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/SEYOK1611906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fb07f943392275e8a8f4aa69bf2fb3c0f5d16cb1e658255f10b27d5621273f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SEYOK1825971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a827a0b9f05711ffbf5af6b6753e52cbd4b5d009b7bb8e5be2e129d3285a5be. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:26:18Z), 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/SEYOK1825972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a8b09d5459a684ad32d48cb56e51f83cce58553e96cbcefcb8ee30f89f379d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:14:16Z), 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/SEYOK1825973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2ad7afa1efb6292f9bf15e654f3c391b24cf04af4b5f78cced505b7bdb966f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SEYOK1825974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614c7a42c1632d83b5c8964b7f910925113c848516ff34d23d7eef864933d03b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SEYOK2308887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461e899ce93d1d0b677c2a53e08408e6e1faf0c79a414bd8664d21eea8558c40. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SEYOK2321564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffae2b4f334db1380244d73f9f0cf53398e74f8b9e89d9d72e288e14454a2702. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/SEYOK2418548.