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 0x433f9bbb12185428804b10f1c3d92332692340ce3a6c70533f6cd87f36192ba6. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/92bf8686-51b5-4e1b-a50f-34acb8db90a6.json and https://artists.proofprofile.net/proofs/artist/92bf8686-51b5-4e1b-a50f-34acb8db90a6.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 0x1504dae2684c19edd1a5f6230bea1c7f5d1738157bc80f6c1ad1f1b2dd6effad. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFYX2542583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3d95ad1b2332d6a8579075a57ed794518fc8aebc5917df1600cac7c5303762. 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/QZFYX2542584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87dd3eb2a3fb0968474837ac06c95cda98a7878156478758360e8e0a80f5dc8. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZFYX2542585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f8483873b392d6be2d9486796d0c699cc64073f483b5d2a1e4cb769029752d. 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/QZFYX2542590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca26292351839f3de7eec9216c005e6521fb7013c17fa43c65d78d61e4b6319d. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZFYX2542591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028f736751cc65ba64a34931f283b49d9032d64ca5c845049bdf9f57a4ad1965. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZFYX2542592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779d5da6367ddb54378c23fcd0ea753958becf1dc80edaa46e40aa9ab24efe6e. 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/QZES92573139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56bcd8c0bbe4af469a467c334c8330c858652f26d01996ba476694b882b20c5. 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/QZES92573140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fd42b657c5f60b6a723833e0919d44977fdd22641a4d35336321742e5393ba. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:25:33Z), 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/QZES92573141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a52f78e1a0b533e25cf19f09c569988e85a22e17ddd212bca19141d7fa0b161. 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/QZES92573142.