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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35138096e48c51ed7c2a7d032c8b3468e66dfa5b5172257660cc4d44f1075bd6. 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/64fdef09-85db-4543-a01b-7be01b203156.json and https://artists.proofprofile.net/proofs/artist/64fdef09-85db-4543-a01b-7be01b203156.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0479cba93203e596612296bc19427b4ef7d1d4bc72105009595dae8fcbaf4405. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USL4R2492347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994dd05d418fa532d46518daba8b8cd7aaedde151cb32e51ad9efc6a6fe5fef3. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USL4R2494261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4546e7080e792fa2c00369966aeb48834c42660877779bd8c4bed3decc8fac21. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:42:52Z), 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/QZHN62049760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bdcadf91d619d17fd2e8a5e5669f37598b466ef5201dc6d5c5bc727faa4e063. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:12:00Z), 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/QZWDD2289151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24b396866baff50ce145606950ee183ec92ee21da761b7940691841d7547c61. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USX9P2407150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e445f967ad57e01ab05f6421ea4882ea980c7897f0a8fbd52261b61c877b6ce. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZYFZ2307517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f213efc0ac658d41ddfae4acd9c2e6cb2036a16be974504dc126d8d2535e338. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USL4R2492345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cf6f9c02d9b5c2821a54832210e176c1216f51bf6327723c89d77fe6fcb5a2. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USX9P2407300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76fb809097e89562351ecccb89f05d43c37ed5d25375963512b69d83104cc0b1. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USL4R2472164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0479cba93203e596612296bc19427b4ef7d1d4bc72105009595dae8fcbaf4405. 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/USL4R2492347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335349217bdbc01584f761e839b29bf973df70d70f39f77dd9efd191a5aac4b3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USL4R2491796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526e5bef915fc8f4656be2e28e6cf1d929a50046070007aea28221bd40b25276. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:19:22Z), 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/USX9P2401379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7545ad91f8cda1c8083e2bb56dbca444fb834ea1ecb8db1b5d0f16f1f968007c. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-17T04:47:12Z), 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/QT3TB2407565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b959031c656f67eae2e0010e34edad37200c43a36f8ab93d68bc3e455dd67f8. 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/SE6XW2530162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb11ab1d6f828413374cbb168232e49684c402ada3bc4c0f300855a08c4d4a9. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/SE6XW2530164.