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 0x412b7f5fee7a5be0e2c143600ead464ab53539dd004a6b78b19a3db62bfefa8f. 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/a99319b3-5e47-4bc1-ac2f-a5fa85f6c245.json and https://artists.proofprofile.net/proofs/artist/a99319b3-5e47-4bc1-ac2f-a5fa85f6c245.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Astronautiko: Sesiones Chac, Cap 01 (Acústico)
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 0x63cc836c87d1ddf18ecba75126a330ef38daab35e3246675d1a09cfddeebf1a0. 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/QZMZ92319748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25c2e393f2bb050e058030df9307c85fab25ece1ae9f7e40328e76e4760157f. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZMZ92319749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c855a4b7132db9290ef114aebc1fdd24ab4c065a5a629e7fcd02e1cc319f122. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZMZ92319750.
Mikaela: Sesiones Chac, Cap 03 (Acústico)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fac7d6e2404979ccf9b26b89fc9070b580819d75c151f7e6b6033fd97fa768. 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/QZNJX2365008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4477b0a20fbf52d0d4e13c11bfd2e5a6b01cc094732dd7690316995f2e147273. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZNJX2365010.
Nella Zola: Sesiones Chac, Cap 04 (Acústico)
Bray On: Sesiones Chac, Cap 05 (Acústico)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4717bdb8be9002c1a7663bcdc7f7e95db5cf056dd0ebba704fab987007c86bd5. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZTPX2308160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6988c503dff55ba18e94522430150fe71e7475e859aeb700209126b3f031ed4f. 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/QZTPX2308161.
Esteza: Sesiones Chac, Cap 06 (Acústico)
Rolando Fino: Sesiones Chac, Cap 07 (Acústico)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdaa77e572137de5ec805d294f7c81e085a65f0a87197f53d2dfb9cdc267ba2. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QZW9K2359685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987c80385612ad3b1a4f1693e6de786bcb5ca565af3099ee924d29336121b2da. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZW9K2359686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdba1b0b278a3c14890c40fd6b17480df053a11a0d2dcd55e8c3a9477a07663. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZW9K2359687.
Panthy: Sesiones Chac, Cap 08 (Acústico)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ccfccf2472a68ea150d54187854d6e279e0ad050ecffc7c3423d86638269e5. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/QZW9L2319285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40402298568523f97e4e01be07adfa969ea0983f966eb200d7fee6ad9200b97a. 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/QZW9L2319286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725c970f4b206e3355f470dc3b77469e193a259b43efbe7e4612bfbe7ce5cabb. 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/QZW9L2319287.
Maca del Pilar: Sesiones Chac, Cap 09 (Acústico)
Talulah Neira: Sesiones Chac, Cap 10 (Acústico)
Cestar: Sesiones Chac, Cap 11 (Acústico)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d20e813fcecd9258e5e6e6b16bbda330cf7261eabbe9c56e17fafb056cf8e7f. 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/QZ5AB2434233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70663681f03eb7c899f42f128d646048c856242e6bebc97f72848ca000ea528f. 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/QZ5AB2434234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3a7e39d7684c96a57e5e303121ad38530caba570456e2875582d4f214a4d04. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/QZ5AB2434235.
Malena: Sesiones Chac, Cap 13 (Acústico)
Simiocris: Sesiones Chac, Cap 14 (Acústico)
Seamoon: Sesiones Chac, Cap. 15 (Acústico)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf523687904037149fab807e8fd6f274f93c42ec3873d819cee57825dc6eecec1. 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/QZNJY2478487.
Ignacio Torres: Sesiones Chac, Cap 16 (Acústico)
Rou C: Sesiones Chac, Cap. 17 (Acústico)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b404dfb480f9c3dee40dd52d8efc9dd417557c4a063fbe802ded87f50660608. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZW9L2464798.