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 0x7115e8fb1e29a66cae73e0f48940acb6a8dedcc529775598ec629b710f393d26. 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/dca62e79-52ec-426c-a536-8582027c000a.json and https://artists.proofprofile.net/proofs/artist/dca62e79-52ec-426c-a536-8582027c000a.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 0xae41233e46240083de3d9b98533f5ed4ad76974bb78b4f1ad0bc2b7dbb50c526. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/COF019500867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d56e11b4f4f13c5a0684a4a2fd1fba646c8b9a20686deeaa303acd14ed3ce3. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/COF019400489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108b1158b305bf14c18429984c84c7c8d048e7f877ca26cf65bb78fdd2fef077. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/COF018808655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1ab8022289fa9147b299db5aeb97bad549f39bbf1bfc273a0c9af8beb17310. 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/COF019501106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c1927de0581ee091b30f9a746b0726f31454c20e872554f9f95473fab48d5e. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/COF019501114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837e2ad3c2ac43e0922279d94116b541582c57e8da7e43fe9150bb12986e4ff2. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/COF019501119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74c081fea5db3a91b163dc8791db6fe34f8f79b0709337391cc150f57242e25. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/COF019500871.
Los Pegaditos de Pacho - la Música Bailable de Colombia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53ff9c030904b81c83466d742815b3f356f909c6c0787beb31cf5e6b6329c15. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/COF019700968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed79424884355cfe78f729dcabc14348e6d9ae422c243e664c4aa03a8b15ae99. 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/COF019004533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f891516ec3f6075b2a50788bbc334f3c9da75b3727479cc95ee1c4487fa0f58. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/COF010501554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2cd6f749f990bd520555afca3d38ab06f8043204c8ed45da4e6f58266aa8b1. 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/COF019700973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa24c521523af81554789068a3d31d04ea261b7f4e68c515aa9c6a9c4ed1145a. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T12:45:27Z), 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/COF019700982.
Musica para Despertar los Sentidos - Baile de Sala Con Orquesta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6a17b01e088fea1d72d506691a5c5da6ca7b8ed5c455d6600a8938ea14847b. 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/COF019700972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a70f2dbf17c20ac407c4cc94a229e65a59fbe6f2ac666b4edb93c46c806d76f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/COF019004814.
De Fiesta Con.. Pacho Galán y Su Orquesta, Vol. 3
Tuqui Tuqui Candeloso el Rey del Merecumbe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e002ce73013c7fe006b8ce02bce0efce9fec0dc3ce0eb1e09f06979770933c. 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/QM6P41826728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c66930508aacd41bba05226a211e64d1416ff74f821bb532f77144b2963375. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/COF018200553.