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 0x75021857cb25804905fa29a6feb803aec0f0292ef1aa3a91837502d2c40f1fae. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a11e07e5-c3c9-4f53-b094-bb7d379d20f4.json and https://artists.proofprofile.net/proofs/artist/a11e07e5-c3c9-4f53-b094-bb7d379d20f4.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 0x8265016ce3d62f07b179a98b7fc4c0ed5aad12f1dfee26b2800ce106ccb72908. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN42210328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636a654a6eec751f6488ea35cebd21a9d3cd55b858c8956442cf5cbe32f9f68a. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:51:03Z), 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/QZHN42210330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519a916db50c49a92e85769a382f4245d8c98fea6dfb7d15d83f8839cf05da30. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/QZHN42210332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2add394d100acfb8825cc81390e4a041505a957379da0f1c1d348dd96d1123. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:53:33Z), 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/QZHN42210333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ba07c91ead5a85e00702db2aae4a65f51e8d7d33ee18fb80bddc79e0c66229. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN42210334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31160ad9da82c77bc4f215bfdb606d391456d17299c9e17f53538309d1a2dcb6. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZHN42210337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aded7c5398260327f0e84d28c6eaf41f34167adea51c68ed5fa0199370d08b1. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZHN42210338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab254d4a960b3c083267fb05410621aa20696ebee527145d77b4d716cb5df4d. 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/TCAFL2101460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6d173bb0d872b3a02195cce6611e7b2b916ffb03ceb28d640651f10285ebdc. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHN42210339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e207873e78e442304f5af14d78dc95ea424b4161d94aa007295d094bafb672c. 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/QZTAY2282100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc418f2709cad5a91d1e8944c0fe9e412913168fdf3ea4c04d3a44d5e5100e3f5. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZPLR2310842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f786f7199bf089264b555088ab10e9823ec2a6d46b04125e13ac60e54a859f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:02:52Z), 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/QZDA72422730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc336dcfe7230150fb3d7309335c14dd2cfa9455018aa3a1f8f42a8c9576298c4. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:52:59Z), 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/QZTAU2419090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78f192f21b2b9911838a430b700da3e638f83cde9c9a88eaf576f35f57d42cb. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QT3F42431913.