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 0x9ff17ac81a76b12ae5216117732a72fae8e4d1a5e777699722a23278a12a3174. Chain 2 (Bitcoin): anchored in block 954174 (2026-06-18T03:01:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e559d5e-8df4-4d4d-b799-3d546ffbd55c.json and https://artists.proofprofile.net/proofs/artist/7e559d5e-8df4-4d4d-b799-3d546ffbd55c.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 0x054b2f9925a98246eaa907bfb7608a65abd1036996df93b0f861f7050a4c610e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPK401600811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08198f7cebb1d3ea51b8b3adbe3b0b6a08d872076c76956bedf31086a21203a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPK401600815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5014414820710c96cdbf46c85188f48e746de457a0a04d1c949dff0e271d93a0. 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/JPK401600807.
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 0x049b44f8fe428fc9a51141d03eefc46fdabc73085cccc342c24b04a157eb51d3. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/JPK401600810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0756f6d87089c612bccb7901fe6ca0e150250febb081b62feaca099ecd25bfc. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/JPK401600813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1a32ed88a8db3c55d93a2d363ea23f8affc982d8b4adc42464a104b024128a. 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/JPK401600814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53d3488faeb1627c6e1594ed78ecb3730b5158d9369732bd9b17c5bc773da57. 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/JPK401600795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068e0dcc72670436828c8c87de255d21cdcc188c59b858a2a9d36d71dd04a25c. 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/JPK401600797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd019c7fed7de30c3dde42f976fd04774a1fc22b93691bf8593650120cc35b84. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPK401600800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93abea88c71278d0b4f36a446fc17a60acb3801ef605e303222be01959fec2ef. 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/JPK401600804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7c79bf6b7bfd385378c0e6d06a2e84e529e489a13e4c73ff838d8d88c553a9. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:53:18Z), 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/JPK401600801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0875f63386e5efce49fc4915ffd2a0fdaa894565780bde5f7a6aeaa5440fe9. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/JPK401600796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89db70317fcbd4a457ce0b057b98e366285bd06fc57f4145421fda42df95c3d9. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/JPK401600799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5775fd69d5353802d3a8802fc6e61dd95a012a6911c1e9a5a41b06087cec10. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/JPK401600802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95feec796b6c3ff062bed4cf900de23099a7331968ab997a0f01b20fd44d3044. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JPK401600805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2a94c177ba6921527b9be75a251fe81e16624ffddc95c310a3b4cfb2df58cd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPK401200595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6dff095a8c8a9a2b9b6ae997a192fdebcd8f1479573dc4d800ec2802ef53d0. 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/JPK401200598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083f46a611a36c22a30b7e96d589c254bfef711478f1e362ce6357c86591f646. 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/JPK401200603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2aa054df60d3a0504f9dea39dc4566ffb3ef67f37a68d8b66c895571d4f9de8. 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/JPK401200604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8880947e0b0e06e1d9517ac43e486fd120dac0303eff3d76258c19d8f101b4. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/JPK401200594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea5de8896204d440e66e842624135212757506cab683e37aa297c6cc50b745f. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/JPK401200596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ef534ebfc3bcf09565a571f23f7547c6100fa39b1bb44806cc8ccaad19547f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPF810812805.