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 0xde0bf4d2a3304ec9d76cbcca61ac347ace9f4c81489dd0bb69d614141eddff43. 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/8e22a6b2-cb0d-4410-901d-8da8bc2a9552.json and https://artists.proofprofile.net/proofs/artist/8e22a6b2-cb0d-4410-901d-8da8bc2a9552.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 0x45005a1f6bd73d259a8d2679fd57770f3166e0f6a6bdfdb49583fe1e368f641b. 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/FR6V80501163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0686f07c6eefb45c476e71c29965e9548c8b12b2bc8de8727bf1401d947fd916. Chain 2 (Bitcoin): anchored in block 957730 (2026-07-12T16:41:26Z), 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/FR6V80501166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a95d653a08852296286d47958e0c306d16ba840a6ad4712dc9ef718c8c2de8. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/FR6V80501167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60644286f1a9751c4f3c6055d869a1e762e170aeb425b1fd4643e10eb3230c33. Chain 2 (Bitcoin): anchored in block 958399 (2026-07-17T10:39:51Z), 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/FR6V80501168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667bb84cb80213efd700e3247abb6cdcf1c3aabf220486c7320570b138f74a3d. Chain 2 (Bitcoin): anchored in block 957720 (2026-07-12T15:26:09Z), 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/FR6V80501169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7faee4a5e0322f6639ef2878739040cabd7c8250668e05e51067fc71ed6892b4. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/FR6V80501170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4ae45d9556b029253726982c4c0951bb8f42ce6d33cee742b8fe343bd06a9d. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FR6V80501172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06cddc8ee159430371367536d16c0a085ea28eba34b1753ef802a1dcd1793ae. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/FR6V80501173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ece08002462defb481c7f94c08fd3cbfe8e4bd114c3d450a98c9ea92f3a451. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/FR6V80501174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba3e8b3e57e03a8c5ffa018812bd391dd1dab1c5c74c86136cef0eb06a64574. 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/FR6V80501175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b81f8c7378016bec635b82bf07ac861f798ab0c730db1ddf3224921fd3e4b4. 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/FR6V80501178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffdc769b953703c9e6eecacedfc031822ea9a7c3ce37f56c925b61342effef6. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/FR6V80501179.
Best of Ethiopiques - Golden Years of Ethiopian Music (L'âge d'or de la musique éthiopienne)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720965adb26a7d098c7d16d866ccda1d64398bd74f9807094b206dfd213bc17a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FR6V80500939.
Ethiopiques, Vol. 25: Modern Roots 1971-1975
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec70986b4361f1164e14ac830eb187272c54d1739f3139d70d64f264e1fd86f. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FRY397512529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8676e070b0de9f29c1eea8e8232b29556d9f5411d593276791f15fa9472aad. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FRY397512512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14254da4206f5ba08c48f5327449d4c57278ee58805d2f0c81fa8442972b72a0. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/FRY397512516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315716bbe5c028dd9c38b7c0a37ce61cc523366f090866f8039ffdff3fd6f951. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRY397512525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45005a1f6bd73d259a8d2679fd57770f3166e0f6a6bdfdb49583fe1e368f641b. 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/FR6V80501163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641ffb7fe0dd538a6116f266322ec5a2758948b3e239b8f9055c54dd1b598a5f. 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/FRY397512521.
Ethiopiques, Vol. 3: Golden Years 1969-1975
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720965adb26a7d098c7d16d866ccda1d64398bd74f9807094b206dfd213bc17a. 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/FR6V80500939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e88fb225ac431efb08bef9fb85590064363c973905a1d679d3ca88c85b41b34. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FR6V80500940.