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 0xc90a10aa5e222e3161c46def15fe7a33094a4cb28986cd93de72bd6a8c96c870. 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/4d5fec98-726f-4e35-b9b3-b66f033514e2.json and https://artists.proofprofile.net/proofs/artist/4d5fec98-726f-4e35-b9b3-b66f033514e2.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 0x03a6d8867223ab822a46a416c4ecf2cd52ee773cfb95593b5dcb4b81af262059. 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/BXJZV2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7030f18eee4a53063ffb7feec4ee58a648c2b55bcbd2e783da566b15097f95f2. 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/BXWKG2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869d8ce45081e5ddc1c0731473ab0662732331ce061e79323f277221a37cd04a. 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/QZPJ32163065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2f62395807a47ed36f903c838a83835d4969933b97b9142ab716e5f8abb306. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BCJBI2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfffa5c9f5d069369edd5fbebc130e425bcf2552256f059fe498bc2d49ffc541. 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/QZ5FN2150690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674590bb295cdd323116544181e3a6e4a586e8486c55c352c87759dd92d31ab3. 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/GBRKQ2046114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b7cca96e056fb745011b71ea2bada4742fd26477c8877745502895fbfd403f. 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/GBRKQ2010647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1778663fd236223bf40cb398be4bc395bcb633e3f8bf09dca162ae9039db4a84. 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/USLZJ2062128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4d043ba1fc09206537f2290123fe393f88e71381f679f8c7fabac8328813b2. 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/USLZJ2032042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b52cbad69babd3873cec1c707169036fc0c83a73d308a16e7f3ece216713b52. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZ5FN2068749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6ba7302098245f8e27cd8169338b9f4a4cd79304269ad0af5031a8cdb9584e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZ5FN2052208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61ca7e0187625a5a71fad684e2e628771acb5409a7a0152032417dc2baea485. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBWUL2087079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570d873d11ec40b7fe7af2224f310097fbeb4a069fa5e77277f2424c9b4da81a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXO8O1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413b9515614a5115408dea6269251df60a36516d4895dd68771f6aaf4457c7fe. 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/QZ5FN1974843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8beb7ae5ae9b2dc724f53f62d02b70c4ff42135d9e3dc794858c8fc06e665aa7. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BRSME2004272.