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 0x5a75a676afeb9285a69c8ecc4272a19dfca04be59b94f15b5bfd9857ae8ae623. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/78d02f7a-2a34-4788-b843-cdf7f147b0b7.json and https://artists.proofprofile.net/proofs/artist/78d02f7a-2a34-4788-b843-cdf7f147b0b7.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 0x487c6cf984d63ab132c521c58410da25de6da7c7fad438a8755664705a36fdb0. 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/QZK6L2564218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34d2ddc8b6b580a2420d672c204fb4621f7fa718ec28834a8ed55ae7e4afc63. 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/QZK6L2570913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f5452f1b5986decec7843a73bcae3c7146e7c2437808ab330c2bef61b81088. 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/QZK6L2570907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd581f4b35e45cfdd4a55be2686fd185b09d15cd4d7476726e3cb65739280ce7f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6L2570908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a29dec08dae7396bbfa815ccec7b4c9245c78016bc748a364e59de10dfa163d. 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/QZMEM2538168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73708e43701baefbdf4a7fa2b9d773567d02522c05ba6f0a0aa5720c25c04c8d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:53:33Z), 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/QZMEM2538184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe579a88847dad82d54be34ae7695721c77ad9578e0047a41789ee4f8c3832466. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:34:32Z), 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/QZMEM2536191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71ccbab040ad22d178e9a40b5883ec60e592f84f217b376c3d0045b95bd3890. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:57:31Z), 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/QZMEM2536159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16fbe1a0cd30e70da01da18aa6fa4848fa8838689e14e17d17964e1fa0cf542. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMEM2536162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36bd7b812fa593625b5c13ce8b3b3438b2a7722bbd9469a7e43ceed7de40b8fb. 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/QZMEM2538170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515f17f36a51fd7dc9af27066f5d660e7789ae24bfcc5c5e5195ba54b9d86ace. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZMEM2538250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab3c5cfa4ea20bcbc08895652f81798cd7060a59872850a5a3c4f55a9c47855. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T14:03:02Z), 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/QZMEM2538228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa87599d8c77861b4faee20465cf3a626580609adea8b63351068cbda35325d. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-20T00:27:48Z), 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/QZMEM2538254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c00c5deab32cb7ceef249468dbe70b678c378b95291e5a286ec4cc44da2a424. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:51:42Z), 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/QZMEM2538255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac72acaf6f39efe4f125cde6ca0d19dd93de8731dd4926f09f1683a55af39062. 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/QZMEM2538205.