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 0x46a701d9baa630c29c88ef81bec3f0f445ea28bdbdfe47e8bae8ee026dd6ce64. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/942c2807-870f-4a6e-b60f-5b0f40f046da.json and https://artists.proofprofile.net/proofs/artist/942c2807-870f-4a6e-b60f-5b0f40f046da.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 0xd7b53f2e142c496c46ef9ca7a621bd1f52d1376200d72fb7ba7da14252b3b28c. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:24:41Z), 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/ARUIH9900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3f97dd275e94eacc4dfdef43c0471c2afc411ae27639bfe9f846891b4bdbb6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ARUIH9900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08972c926979b65bb6a5029ca1d14c52441fd0550e141f445a18a12a38e30cb. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/ARUIH9900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20ec154a84cb8aa3b2f610c8c6eba0439eb14e4e36df6b8957949cc529e2dfc. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ARUIH9900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492c038b0848a1a98e51a213b448a7122c18203fcddf444df4f39f3d1983da33. 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/ARUIH0700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b78263136459817e7df072b74c9d164203b821ed5d557977c077da5f3579952. 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/ARUIH1000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1e4dc4b099d66001c5c85359c8a83b4d3702ed735ab195bb8f4ad13e6622c5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:10:42Z), 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/ARUIH1000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1060a014026c77536cdf95bb9f72961f0b68f9adfd06ee5febfcb43ce37def62. 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/ARUIH1000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d45d34f71f40ecf8eabb84f5e83a81c805ead7ba2b78e1de105dac1d8b406a. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T16:06:54Z), 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/ARUIH1000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d972b124667f2cde8b967648cb76e3df077867a7bba9243c7dcd9fc860d8f6d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ARUIH1000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94c46813c0b1132420be21089940260ed29128c5907a7e8a8a357aa6f3e205b. 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/ARUIH1000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfb818eed73ebd7f27dc9346302e202baacf7c5661f0ac66b3b5b8822c0aaa7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ARUIH1000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa0e5438e97e1bbdbc125a3cbab231571f82435a89d0ed800d14bc59f3cb138. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:18:59Z), 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/ARUIH1300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82db4b65134e5f8cc5070e8281838f4af024d66667e4903c673b05e615537f84. 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/ARUIH1300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a810aa525828b4a3b16a7226866a3bf20eacb132a4b9eeb9752a0745d941b71. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ARUIH1300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeccddf0a847d2284bc03e1c3b9089f80ddb32b774df1907aa79ec74f81039b7. 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/ARUIH1400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb553262ffc11cc21db00f661918dad2a2171ebdbceffce16ae91484df624781. 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/GX4R52108460.