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 0x56fdb696d60280f0ae16b7efa7e99a8244c222d8ec1f335faa62cbc1d43cbe6c. 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/073d7706-2d69-462e-9803-25b5c8487c2a.json and https://artists.proofprofile.net/proofs/artist/073d7706-2d69-462e-9803-25b5c8487c2a.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 0xde22c900d05a4ea0830e939087b489827eadbf01ed2ba6a944bcc103d3b8f1e8. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZMEQ2000111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10defc8c17b26d60e96310e851c61b7a4575e49df8f7a3bc72b5d4de29564c5. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZMER2070828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed310900944dbc865a3f68ee4fbfd5944f8d513b27b466a32356c4d20b7dd50. 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/QZNWY2035141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c25221e236d8725c6a4bda563bfc39fcd317a2cb254cd4c19b031ba041cb35. 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/QZFZ62141879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebfe2afe2183944a4b09ed3544305233dc28e0b36655af415638d09a09713672. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZFZ62327909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97698ecd6d90a3e57770226407222b1a035ac2f2040e2bb6d07fe1bd60a1b7dc. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTB32348589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e49a643580b32fc249d8f4c928c52442f1ba3f07d0284b77e36d6e9245d8b5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTB42417557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e49a643580b32fc249d8f4c928c52442f1ba3f07d0284b77e36d6e9245d8b5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTB42417557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2f560d529d48ae199266552269bb4c08e483a1f81a19259aed42750f33c8db. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZWFU2412259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886c767b0f5679705d56f2fe47c2b4dbab75e2f743d2337fbdf9b630409f6cc6. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT3EX2499742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1721e8ff30bbf40e8ce41a92630195df047fe079eb9dd1f3dbc5f6542d0a0a52. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZZ7X2587235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f89f725bd3a58b245563b1660a483aaa81a3388e3a151c853b4755bcc71951. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QT5M62553253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b239a9a4126b35f229bc89ffba44be7ffa1918f690a4ff8e096c1f79ec01af. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QT5M52556254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe232eff034332518ecd03ecd934408800443329b85107c92b5b0ed76071386ad. 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/QT5M62547029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e5c355d8cfe519ddfa349ad207226b4842a296605213c1376c5850f8660a78. 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/QT5M62556315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa3596d4f907a4d71f64f5512efbd4576fe9677873666cf3c4c4481659364d8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6N2156762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fa1023bb9828c49d274922f7c24aa09640db560e6f544fdd57b9b9dc952a51. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6QE2129677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f7aceba73cf72ce4a93706a0fd202c750f3363fc09e8088aacd7a142794773. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM6MZ2392796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58efbec752c5bca89265e95ec615fed5a8ade37b0b1351351da98a809156141e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJX2482008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d00a13a3ab08392f91972b6755a156bd184c0c396f04abf3f32af6170763f2. 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/SGB502309532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23c3655ac6cb4e1a9fd546be4bb53823c2de5f73e54c8416a71cc52e3611b6f. 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/GXBAV2390479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274746b5d488fb773c787c5dbaa5da9a80f0f1aaead074940a1bc1c1f13d652f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJV2461914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe177bffb17ddc15b3e327c44bb3fd2804729ff242b238bc9459f5c412d3449a. 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/QZ5AB2412022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d00a13a3ab08392f91972b6755a156bd184c0c396f04abf3f32af6170763f2. 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/SGB502309532.