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 0x01ea6b741e880f40479d9495259c986f9e08619c81a844a280c8230887b27f89. 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/0f1aa3fa-8d40-44ec-946a-f2dee785b24a.json and https://artists.proofprofile.net/proofs/artist/0f1aa3fa-8d40-44ec-946a-f2dee785b24a.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 0x23a639fff9824744bc339ab4a9079566549c1a5b489f711cc0254eb8b6987753. 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/AR5UH2400540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c25e3ea09ba1b87eecb81d6f3708a6e432e5f085ac3721577924e25b254a01f. 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/AR5UH2400541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d14c37d51ba9c3dba2c4136a984e0a09c0501f322673f13ac01d9b494f2fb6. 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/AR5UH2400542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567ed8c81b5e8de20121be75cca8f2b58d08366c7117883e1e1d77f4eb5adbb5. 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/AR5UH2400543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ab0c8ecd6286a26c327610a2cb8ca4e41274bc74ce6235e7c725b0faffc925. 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/AR5UH2400544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e482175ce23fd94ab0116f3342f21e7d3996cbf06e1d8639a9b4b15a7bacdb. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/AR5UH2400536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60453096862112bec967afb2b9daec5d7d8983975e9c4d8cd6a379f070ea0725. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/AR5UH2400537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32737095a35d95d970924e24d2739f16c38a3096403262adf784974ad16f2e15. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/AR5UH2400538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe42be123880a92351bf49426a4b04ee52c894ab69440279e99228cb06dda81f. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T11:57:43Z), 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/AR5UH2400539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad92e7119f6210788729f7fb05654783c11d9e24cf3dfa8dff0b9cdf52d4efb. 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/AR5UH2400718.
Pa´Vacilar: La Banda Tropikal de Vallenar
La Yuca, Pobre Graciliano, El Chofer, Ha Salido La Luna
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530a100cfabd0a6fee93aa862d84fe21d5e5d2c5bb4802d5bda75f6e4ddc7b74. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/AR5UH2400706.
Las Dos Camisas, Paloma Blanca, Los Sabanales
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098b2357b4c64d4bbe920e12f451b3652fe8f77706af480e0844f1285adb2727. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/AR5UH2400707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f2db545f19c4877ac5437bee3cbe2f4106c697d4d19a555609a118fc236539. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AR5UH2400742.
Pa’ Vacilar: Cachito La Leyenda Del Saund
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0712ca813adb627a03ea578c2e3183bc72a558e7e28ecaf326cf4a35a6b5ae9. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/AR5UH2400871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cda9b242554f23250aa9c0273edb41f0f8645bb7042d6a6fca9562241b993cb. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/AR5UH2400872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaba70dfa1cf7f78f3845286f84a68bef45dcf611580bde14dc2146b87ba1b88. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/AR5UH2400873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3b16a371d5ec75217f606c027eb9432b976a38301ecbdfeaca94d8dcf321c7. 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/AR5UH2400874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a29cdac8152f6f8d2f11749591b6a9d898302e1103e31e2a23633fe75b857e. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/AR5UH2400875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1609532a3878cc7b4db79af23e4ee9f869d5a61495ad1c07cbd7d469f60333fd. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/AR5UH2400876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeed4ade9ab1a8209640b6f85dc7064d7f7b6bd5c7e7d3fdb703b6be7a7f55c7. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/AR5UH2401275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc283de913b7fb5490e62a290393a8db01dc8bb6bf26039924a47b77d2af5e80f. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/AR5UH2401276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce47cef28e2e0e3a81887b108534ed138dbc62bb3f14d0fecb0ed410f14ca60. 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/AR5UH2401277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4814d98a05d7668cc486713bae63d47511c9bcc3e843432f34ef0c57c7aee7e8. 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/AR5UH2401278.