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 0xb97daa28bc6d6c223160ab953d0db1efb34a26df7ac4b6664202e8b0904e7bc9. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/69edb84f-7182-45bc-9dd4-bdcb90a151f1.json and https://artists.proofprofile.net/proofs/artist/69edb84f-7182-45bc-9dd4-bdcb90a151f1.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 0xf3e5abf3f8ab8616f97baa2caf8a579c0d507a16aab38a825464af44554a9edd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USZXT0811142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93dcf3ae3c833bcf5a9f449c1c2c4921b1dbb9cc000243aca723675e8360e3c7. 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/USZXT0811143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66c698e269ac04197259a6fbe78d9afe65ab2351af7e9dfe721fa72d402261d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USZXT0811144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c88f1d51a9dc3fbd3f93eb6dc9ac3547ff435f63042c95b017fb7e508eaaec. 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/USZXT0811146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85593e6326574f028fc9c631753b36c619491c06a2fe86f44aaa65e975e3089a. 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/USZXT0811148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc48dbc5c5dcdedc8fa4d34bc9d90514f41b95c088dc7b572a7afe474a57d77. 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/USZXT0811149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4564bd52b332fbbdf3548c68125d491653b8c6577bdda80bc8216fde22ef547. 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/USZXT0811150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6fe974efad4eab9a09e89a4c4abd1b8ac4a23a6ee2f67e3faa51e050a2fed4. 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/USZXT0811151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52eeeccfeb7abab8a2a013e7765b13e97191c9528cc591ed242e7d682805a899. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USZXT0811145.
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 0xfaca91c40fc277eb6a0b7b12eeb4725b949db72d5007e261d92dcea8d9b2df35. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/USZXT0811147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19818d0f4c990a3d83505354afa0d4400b981f9c30d9d4b17eef1b74a8d5775. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USZXT0811152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3906384bd888821b90ea050fd104845f420c675be8e1fd1d6058a5ee1179d12d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USZXT0811153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd752ad769836f066dc47858a4b016002e7bc617fe4cc6e9e08164cfe696681. 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/QM4TX2558902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1940bcfa25ad34d39e599792242ee36264f7fedf9e22f8c175a0e87380da91. 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/QM4TX2558903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3ef108d6d835c84a517ee223cb67c465beba12937eb6d0b5e3988f275644f9. 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/QM4TX2558904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea162a7548c349e3c60c81c771bd8e0d954f15b87a9e9636141beffd578af66d. 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/QM4TX2558905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a45f14275a9aae3a2b434286bb33a66e44778d4f95904f42ffe763164522b3b. 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/QM4TX2558906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7a34ebd06850a0878c5764a062c1912dcd3841ce6995cbb62844de6c3a355c. 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/QM4TX2558907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a83dcf384c04b8df7b71e1566ad36ddaf5359062cfe82f73d61e69382703ea6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TX2558908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8836b41e782604284c5d71de088a5651aaf05c5f25d73633367470ecaa4f01. 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/QM4TX2558909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b477dfaaa5f3ca42bc05000d3e9f2adeb1db0a688508d841fc7d1514c2cd4dc. 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/QM4TX2558910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c88505c7a8b2493cc7ec2351fb15af1260d6fbc88f89856da20e1364d7e15a7. 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/QM4TX2558911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb824c0df484438487789a2e64954b4c5a1e0b99ff53af2465ecc5b80b02a6b76. 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/QM4TX2558912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429c141ef0996bbbf9fda0b61ef8526600daeeb8c29ae968f9a30d8ffe822a14. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TX2558913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fd758b12b368863debb52e9f91343b5335dd4b3d28feebced9b151058226eb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM4TX2558914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac67cf581dea0ae8afe7e7d2a4d2e12d9fe7e82fbd3144ef2967bf1336e12edf. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QM4TX2558915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee38b025cadb6ecedd2373de61e44178206a41fdc810eed7d7917277c6ee96d. 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/QM4TX2558916.