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 0x55e5702504aaeaa72c9687bb48e8c2d0ecbe312c68526ffb9b54b29f3b1a4f3a. 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/29b13fb5-17f3-4e99-bffc-a7315845442f.json and https://artists.proofprofile.net/proofs/artist/29b13fb5-17f3-4e99-bffc-a7315845442f.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 0x769392e1f276f46a71d068e7a87dab2861a303553015741c550f8cdda8e09d53. 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/JPF810811701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7ff865fd5c8887df1a54a32115fc0b5c64383f104ed68db81ffd7b857c3556. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/JPF810912001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f2c4544009faa3315ff702b78e24219452bbbb39a97522ed377c76fb640425. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/JPF810812702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6d3671d2fa1c60ddf6a0315eca578cb424d667310d515fa75b1a23dd8eac64. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/JPTK01202790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51b9fb10ca1e286c131884f4b9c995fd6517702581fc5db11032868a6b1fa25. 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/JPR751500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f8768911d3452465e718867f71e4b652863a7f8a04017dfdee8dfefbd1b8fc. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/JPR751500042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2efd876577e8e57ddb6d223b845191adbc445a9ecafb281659255cce97a4ca. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPTK01803860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7f7cb2747724d5284062c54644f66e0ab8abf9aaac698de64dd04ea66dec3f. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/JPTK01803870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb0dfed790a4c856230a25688d21d94c3b57aa34db9a7b35d194e859027e415. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/JPTK01803880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6967448c848853ec8f6a56cb39cf601dd099431ca7ecb638482c6013e3404d. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/JPTK01803900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3d0790c373e800366c724e9adf25680426a8242207442e2add5ba96a67fee7. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/JPTK01906190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79abe5a585fcfc65934d4d1c8e3c99840bcf817bc584cadcf4c3ced41b18cae3. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/JPTK01906240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c43c78d2b3a48dff3e53ab5d722d6bcfededb7ded2b057be3d7224c27a77d9e. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/JPTK01903329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef626611f54efbb669f5df413e0015aed5faae6cfbeee0f4279203162a018d31. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/JPD952400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117d2fdadab5835786680851aca0d0afbb60d7485bce714e4a6c3c73c87b57e1. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/JPD952400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23e138ab7f188b4fa205fd741184703d10a3d69b909ec1972a016b73276625e. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/JPD952400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b455eb0d662f25c05b6b7575fe4b517ef1f3a418272833d3c4ae69f17dc03f7. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/JPD952400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc673afafa3bc742f763f02414c643829c36c9e65d622b6e354db2854916d3013. 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/JPD952400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a683d36796aef9fd0b78460602008496763bc0079ec309dc69911e415cf199. 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/KRNAR1700691.