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 0xdfb3beee7a157e259bcd91c8723cb1584f9c7fe9f46cc124ec6f92887fdc2a1a. 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/4213f69f-0f57-4823-bfe5-f45f73631b9f.json and https://artists.proofprofile.net/proofs/artist/4213f69f-0f57-4823-bfe5-f45f73631b9f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mis Primeras Canciones, Vol. 1: Canciones para Niños de 18 Meses a 2 Años
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 0x4e681d0ef2f39bf5b2de1550cd4aa26c4f31099e0c4d8135beea02d4bf2422c1. 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/USA561119242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163f25e733043b9feedeca0012945681288cc488d8e188fe9208b9699a87623c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USA561119243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e99e3ad1e878e0fb86dc1923af0f2b2e28dbe1fd0ef7e943ac533a909e1087. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USA561119244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a1a8a63ed39fb8758e1529143afbbaa934c992f8cb6e8637939268c6e6ce04. 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/USA561119245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa789ce52f235d517605ff99a1c07722a1b46e609b979c70bac20405ea3d74588. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USA561119246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c3ef4bc0d8d7219c6efe70652a9f39c70d190c5797d288437e2f0aa99dc468. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USA561119247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7f4d83af9d8fe6c32a24f8e507701380a8ca003351283dafbfd75c418b0cff. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USA561119248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e4bb94bb14138a7165c103418b43a71764464e7af2650850cef3daa77e182c. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USA561119249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea25f2ec2562a2bb3e30f0cd4bb5219138cd818a022abf57a635d94c1bf03549. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USA561119250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc815f23424c311b25b88b3fc5347608ea1a3ea1fcd9e50b1238e05752b297d4a. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USA561119251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024482a3cfc5270ae9824ce572bdb9b66e55af962d5cab301c4896860644fd28. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/USA561119252.
Mis Primeras Canciones, Vol. 3: Canciones para Niños de 3, 4 y 5 Años
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0aa1468b07f24b680eb12dc9bda70ddfc074b58ed65a5400805703f86ecdd6. 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/USA561098990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb279018f6415e5e7a802972dd43f10ad031d8f3d39b52bf4474a239bf115da. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USA561098991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ede2b35ae58b3907a8c70a21276c89bc1f740167d9a199271887470382913d1. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/USA561098992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e1bd877998549dc21f0df955374b80965dc331776d675ea884d54429af5d53. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USA561098993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f4e0e2b0bdb45d82a6a06be680af61c9cdf329ed9fd5d26ebfcad699c8abd6. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/USA561099001.
Mis Primeras Canciones, Vol. 2: Canciones para Niños de 18 meses a 2 años
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47df7a6107123cb48e4555b9165b41c9161d31b2e56a6af9895092bec21e73e4. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USA561119253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70082796a51206ec640a3536baf77805ddb23782e99c87b9f14bfa77f2fb976f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USA561119256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0a998ece1790e9ffcd8eda565d62088c656bde08cfaf6bff1e1392fb0b11f4. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/USA561119258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc7cad37b6f76391a279eff7f2e511935db7e186ac7f63aacbb19438bac0e98. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USA561119259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda44b6d3af1f6e7d506a9601fa0aef9c4efdecbd490b4f65bb3ef3ac49a2219d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USA561119260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2aa39c53142ee96d6ec13d2cf85dcf8b793044852497031ca99a9ab9be06ae. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USA561119263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88bcd6ea34a01f227de6e14cac207265db542eb09b516bba90afc128381d3cdf. 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/USA561119267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc167e6bbf391247b2c4fbd233a4acfa03c933dc83d0031be5831f2bf2f0dd3c4. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/USA561119268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612541de810dd56e06c36742c3416c1b000ef251da909db1774e58091a69c378. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USA561119270.