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 0x5f40ea738ec2e60b0f122b233965ab2928bf4c4c0cebbba130231126923f332a. 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/34ef1b59-f2a5-4321-823b-1dfcc1de597e.json and https://artists.proofprofile.net/proofs/artist/34ef1b59-f2a5-4321-823b-1dfcc1de597e.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 0x945f655b45bcf7c8c6949b8afbffba2f841437599a596b141bc5ae0d68c9a900. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:49:50Z), 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/USEK71215201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0165e9be64d7262e87aeb15de3fe7f447f2bdeea57a5005c4db2bdc4e04340e4. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:40:49Z), 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/USEK71215202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff5f6c8411670b5d2230e1b38105f1040a5fbc029c644883da8160a25c684c4. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USEK71215203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7fc59bf81d78e64b16d2e1b99e11cb648745dc70c205ccb7b20902fdc75e41. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USEK71215205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0545f4460cfc04004e014c5f56b55a605a2af54d3238c5f0439acff65a2a63e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USEK71319401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ecee84edf6db9c5178ff33c7912b711cc05347b05f124f53ffb2f2f1690bb43. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/USEK71319407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ff9b17397035add760e86784df0e4085312724ab16faa656455f8136fede77. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USEK71319408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74766e1298faaae7ceeb2fe6b1dc413dca2c10f391cabba2f1899a6339829d9c. 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/USEK71319409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde08d774e73c7296b6333338619460af017cb52add3dfefe16f0ea3e13ad6db. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USEK71319410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc477c3d8b08642c7a6d195678580c359574edee4da00cc3af7ce5e09b806eba8. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USEK71319411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12151ca3b03ed52dc2e0a4459b8f42584a5005836f15fe0dd229ee2186f239a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USEK71426310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64982df8d78ac508f37af3396891da3a5f670e9b70b8a1a308b8e6b922a6b9a4. 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/QMRSZ2101481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971bff2d86e6567b6bdbe2eedaed0a5fca4d6bdf881ee120eaba4ce50880ab2c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QMRSZ2101484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fe6d47d5ecfb8ba05960cfdb3b03ed4aeadf5c3af06b633996321d595a3625. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QMRSZ2101485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba19aa2af63eabd24fdc711ca0f085738ac8526ff9aebca1e0e46fecd51679d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QMRSZ2101488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0134314a767b7e5a19116417720bc94d66602119592bd18a650ed60a31bbe5. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GXHND2574795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f9a2036058dc586f18ffe10055754a7c980af2085c5eb3d2dc322985caf6fa. 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/US5261420313.