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 0x033acccc4499a07bb1162ac95f7fc44455c5f78c7afbcbf44256f3430dc1e37c. 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/f4b9be7f-fa99-4c99-a864-4561f03729b4.json and https://artists.proofprofile.net/proofs/artist/f4b9be7f-fa99-4c99-a864-4561f03729b4.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 0x0d679d760d08b00f121efb3792595e553bfc50b116ad88e9a4ece86e27b3c707. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/AEA0D1881552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef7ead734466c66e157e6e9611f02552af044b235511e05afe2a25220edcbb3. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZDQH2145830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564200fa740f8c64705a42a867788332da284f26c001cb2e423081c90ea564a9. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZDQH2145832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf66c1fa4870afb9c65578073f4d1c141a63bd7beeceddf649e2bfaf3703985c. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/QZDQH2145834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64bbabc2c4b544e77f1fc6f21dd2a2d0778a526453e5c25edff2d0581e5ebda. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZDQH2145164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939f2a3d364fb558223eb90721b78fa5d2b5a90412c52727a2d7c8e9c8a8c868. 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/QZDQH2145165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd675d7c877f76f5d99b7b0e305670b4060a536813e5090edf1a559e7e83bfb4e. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/AEA0D1877374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb327a0727bda041c34d974cba7ec1df8bae30c2126123f3194f74c6c76bb2b77. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZES82152746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe452b9ff7d93b1e84d973774e79d97d7f45283b458662b6c94bf0be8e3adfcbf. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDQH2145214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f6dc181ca3ed875d76cb1ec3ca1f029dc624fc5a886e8ba2bd107446e49898. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZDQH2145223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b4637b5511a4a1ae9a4219edd3280aaa14d3e359a9e7b0b514b0b272f62875. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/QZDQH2157530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb40c89d57c0064e8cfaa838e5809d3ccfc6b8f815921ee072d0205c87a7172d. 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/QZDQH2157533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf189363c5604f3a99d6b4e2639e19262bff97296035a9ebec6ba7a33f68ecb77. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZDQH2157534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1981b3f04513908b65137d4716bcefd9794034cf019a806076f8cfd7da1e40. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZDQH2157536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f81e3edba6ebfa27ef9248be5fcd8024ff1a3ce5695c78becda7b61e5b77e67. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZDQH2157541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf530a229e0436f881661ab13ee56caf3805889cadf2e7100f45a49c3c9792b6f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZDQH2157543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b91fda5f08312307268a77316d7ba0c60e48a018277f4e738cc080585b5fa5. 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/QZDQH2255922.
El espejo del chinito / La negra que las afloja (Covers)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e6e6bacf5d47b9772213094d7e0b5fdfb339e539149d4abd890b249b1b4128. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDQH2394193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92dd15996874078ec9ba382315db6a58c3462351716ee688ca2c7a7bc094876b. 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/QZDQH2439202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c89cbbf1d669c2b1bf27e5d66ce5ed6402d0d5b6ae7fdc18abf1b197371a902. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZDQH2439419.