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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566194c74291c4451771498984bda964dfe3c001acf1dd22fe907c2342f1d5c5. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fad139a5-a599-4b0c-a3b5-7c2f358eb6d1.json and https://artists.proofprofile.net/proofs/artist/fad139a5-a599-4b0c-a3b5-7c2f358eb6d1.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90b180cfee939223805f9d5d1dc48a6651dc320b0f6817899c505579c7ff886. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/KSA012338776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad3a66c77a80b4b14559e04f10d7b040af842290bb2482a0c5cbce2cc712f54. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/KSA012338777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25227523f443e5662e97a3520e32e2d0c59409dbd6bf6fb2b25002945c644383. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/KSA012338778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60eb9b4e00e3d5e1b5adf606c682ebb7f2b6c50076623cd1f0e6d8f02fe9eb90. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/KSA012338780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edf63c5fbecaddcd9f8c88031d109e54dedbd70108537387db9a7e25627a838. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/KSA012338782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed62a0d25892891154d4185d9ffb0a3c4c6d1fc630d50c746311d60bfea1d21. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/KSA012338783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668815834feaac534110d5c726885500821beb9eb7da0bb7cbada7f6e6c1affd. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/KSA012290779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c55544a84b106ac210377293cce7bb69ebe3daa15d0c48acbac22c8630e15d5. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/KSA012290780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6a1bf3ee9832f5f77177405e41cb048e6beadc85a2d181591bbb84918ca3e2. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/KSA012290781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeaf5dc64353a20560d0bd80f58d32dfabcc8766fdd03d4654e8055927c26365. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/KSA012344088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723d307337f505619bdcf691cf4088143ccb4c2a05787b197908ddc6482c18d4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/KRMIM2430151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897072baeea97e41b6e42118506fa6b2eabf89ac89f2e7690aff52bd35b16e95. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/KSA012199481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f955f9d75ce0032354217cfc899c343f31cbd594130ea20761019f00eeb8a24. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZEKE2084769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1d552a3e026ae27f41befbbe862b3c23ca9c9fa64da15a1fa81473420f43ad. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/KSA002421028.
Top of the World (feat. DollarBoi$tackin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804b85f712c5a47884646bbbe1053bf8289127b50e60034b5d37573719b30ad4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/KSA012299026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce6e475ce34d44ffc2b5caffbf7555c85d47ca1b6c6bf22862e6ad1f9e50cea. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZEKE2084632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb29fccf20826585267b089955b042f91734139b6bc99c9e495ae4e9900ba81. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/KSA012242782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b0d74157a28b86672d8d8e852742dc7d713eb97658f4fe35dbfeec60c54b22. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/KSA012242785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d079980cf9a68a5b1012b6ea212c4d8cf64ed6faa6361ce3cf8f9c13b93b277. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/KRNAR2352102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242a074999c6fd9e27330c536969fac21ceb5cfa32f683a9da6bf0e61ca7c623. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/KRNAR2352105.