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 0x75af19454cbccbfc5a3f2c95865a836f39202103bd23a54c3daff69fb520a2c7. 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/2a4a0e0e-034c-437a-aaa0-13efbe8d3a01.json and https://artists.proofprofile.net/proofs/artist/2a4a0e0e-034c-437a-aaa0-13efbe8d3a01.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Somehow (Original Motion Picture Soundtrack)
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 0x9a586245febe4a6cb00393d99edc2b541c8d68db8210cda7af58511750f1c6a5. 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/ESA011511158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3888abe33e6b649ad103d679c1a63ef95084e9a5ec67ef42b4b130489e2180f5. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/ESA011511162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33e5889668a2e10b0909378272f9b4be91cf9abd505c8bb18b01049bac7f11b. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/ESA011914523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1750272cc37a3a162bd078c9b41903e467e43e15088f25ab1e1a40fb3ba83556. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/ES11D1900242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39df0fe4d10062537e80fd884fd941ff76585592bc26f3d183ead508dc7e115f. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/ES11D2100496.
L'arbre plein de fleurs (French Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021a66c9a8ec2648390a90556e39eb45ce087f45c397d8e142703b9f751edc3f. 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/ESA092410568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05d41beb279caae49add7d3bca32a87523a40bcba6dca1b21cc8b6504b1b7c1. 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/ESA092410569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3787667f1e8c3eeea009cff658194a55390a94c1be35818178ac7b69ac9d0119. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES11D2100565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267ef8cef57fac2a46810fb1b4ddb2e584c679dd98f526ad9d07e062f0892eed. 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/ESA092410570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c87aeff3a870ca39dfaad1684b12f998cbfcda03ef2f88ee812d5d0b989f08c. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ESA092410571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488f757559ba89884ad7f86ea16456e51ada123fa9e92e9cb71a6c9fb77eeead. 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/ES11D2100652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a9a38ff73cdd09a3922ba713aa920f11847a07432bc7eba9f86994e6602d16. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ESA092410572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188302819a527bfa537baddbfd3e3fefc9c1b9424520db6afd888cb1a2395aef. 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/ESA092409901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8daef881aef31ff6ffb17127e24c25d5932b761bc15b4d9f51054ef12011289e. 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/ESA092415232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08943c16c974e23d3821bd499e5f49400f9b62d473562b1a97f875487bae138. 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/ESA092410574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8daef881aef31ff6ffb17127e24c25d5932b761bc15b4d9f51054ef12011289e. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/ESA092415232.