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 0x1b2d91703987419297237c6e9bcc88a25c5d7d5d6218b6a1c9483a30296a19f1. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/728d0a51-5f0c-4e87-a802-b9c4f1a50d17.json and https://artists.proofprofile.net/proofs/artist/728d0a51-5f0c-4e87-a802-b9c4f1a50d17.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 0x939c80733210268bd684c2d07bd4566abcd24567ece75290533ecf330ec66299. 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/US23A1500985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb081c7dfeced247fe79cbdce6c61c01c90140a7e422df63b80726b57294b8e. 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/US23A1500986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df9b1510fe533fb3c5b6ad8931ddcc90d0f3a13ce44faa592d95ad0d98ce539. 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/US23A1500987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15004fb7f0dd1ead327b69151ab6f8eea98b0b0ea1f78d1c9e139f10340e16a. 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/US23A1500988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f97b597c0444e5a031b9d56959380c232ac1308cf7a73e2c3fac6bf4f40eb3. 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/US23A1500952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e85842a9dba23da2e35422aa358725ad7a6cc585e6473cea8941b3603c5782. 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/US23A1500989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb801744f7b279465d4ad5308126661ea5a4af9e97412ddb1763770816e38bc. 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/US23A1500990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdd6962e6d485d8802e31f43d18c3f6e25014b1ac39e8c83e4148a9fc9b15df. 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/US23A1500991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e91c8d5139390faad91439cb03af4fbf283cb8d5f2e31ceae7a00bcc4c4e4d. 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/US23A1500992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd40698055782a02f7c7666c15abf05ba3b15f3671861d8986bc3fd6cbacc5a. 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/US23A1500993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a56165179a81aec40943d36e939a3ff87af621ea041db78bd5f209529aec27d. 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/US23A1500994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a83f410de7f0a21c488b099367b73fe320597602105dea7cfe7bf55db9aa67c. 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/US23A1500995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9ea4ee413855d38bdfde4a28982719d47bed98857061c4d8a1893ffd746b2b. 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/US23A1500996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152c37d70288999adaa675d57eb8e3f646c411886d37bcaac8ff4ed61a2858c9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US23A1500997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63138b10c31f65b35478a62187c4f5da5d4c98f62f4c7a10fc7f9b28e8fded56. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZK6Q1949837.