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 0x76d6f296f7c245b9057653d5980735738797f8dc82df952ff1ec0b7dde47ebed. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5cced6d5-a013-45f0-8c81-0b5fa7597537.json and https://artists.proofprofile.net/proofs/artist/5cced6d5-a013-45f0-8c81-0b5fa7597537.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 0x0dda93eb55b0eab83d522da1d935fdc78aba778dbe297ae5b8e15869549fa4fe. 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/ESA011972052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b356f8cd2a133830c01b7095036d5a3d2c441b7456a0e21b2fa0601b1b4324. 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/TCADJ1772151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc381908ab15707dd7502427aeea441d1b9a143bd03c3c7d15bbb78fc33ed4b8b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCADJ1772165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672b420c7b6bf8ba87ee88b30aa991ec1bebbac398a4d0e4eac60ba324e12448. 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/TCADJ1772168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb776c1408be6a9c98c67e40bf5843011d827a57a6e537e1aeab2529edb5fdffd. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCADJ1772175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0e20faff3693a063b8e0cce337700da137b8d5dfae64921476cb3d2d879ddd. 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/TCADJ1772186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed76f812d14751655580a5bed90a590f6d4aa109ac454fb85487c04a9ba557b. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:37:38Z), 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/PTES11108702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0ea1e17a14cf0ad154a70adb2d078274d5b4cf0ee646e9777274f7c36d7da8. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/PTES11108710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685d4b233c84ee97980470d05d17b6ce3954218f83fef26916385e8e4f6c62e6. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/PTES11108713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b9bea07548994b34cbc5ec88fb674a0837a2349885027a240be38b7856d2e4. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:06:31Z), 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/TCACE1564795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3bf90970d965b102e9c056806e4cfcd06d8d859c6682148ad4ba69eb2775fd. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:43:25Z), 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/TCACE1564801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e174e782ba4901edb3039c380cf24065e237eff020f87dff8ce401e18477a0. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/TCACE1564809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6019e6c6f48f89aba650e3423e80e08054aa50f7af60bb428f94ee38ec64a58a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCACE1564814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732c79da95891211258a71c3734e8543840fc75c077e2959ed23b4f0f51d78eb. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCACL1634683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af08f51faaa369ff4de06292f8529ff25950a4f437d98adfbcaf34e5406fc05. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/USHM21772359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7cbd3371d4117460e6d2bbf475cdd6bbf3cc709fb12d8f1d34bebdd18a9ec6. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:59:56Z), 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/USCGJ1806357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4327d122afecb907869daf0a6eaa128c91ecc775534d5ddc8ecc51f5e9aa858c. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:55:58Z), 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/USCGJ1806360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf2fb91ee8554ffa996445bc01f5347c01298080d033c5ae631699bd4298546. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USCGJ1806361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f83551b0b7f5f324bca1b55a9bc6b2e725cdf5752f55fb9cc40ecde7b1d928. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:44:00Z), 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/PT4HM1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85dd7903ea845781be4ae779004fa645a50e85e14f3f906f95c3b82c8ef57cf. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/PT4HM2200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64302287c164579803db90691151e8b4587b238694fef6d5bbd746b2d795e417. 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/TCAHJ2368347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a751eb334fffae47d807f2a448499fe0d99dcef99da4d77fe820f6cf69e8dd7. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCAHS2370228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bddc91f76a9d9a77327d76b34e88e6c609d27bbd115b3b5d8df28a1f3fa69c. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/TCAIF2471899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ce54825c6de83959cd0814dc8d430031888f570c7aa831b8ab661c37a29bbf. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T23:00:09Z), 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/TCAIF2472149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873b3c091e404695d462b8c3b751eae2faec192c5292d3c1082030e2fc074747. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAIF2472195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30b72158fc222d6157af9b1a3e95c3c854e5664dd5234dcf9d5618ecf64e9e7. 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/TCAIF2472268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20504eea4cc5cfd3fcc8d1809ec87d58888a7d8137bb536b9e138a5a1e9ad23. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAIF2472435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7347714126d9657d6a65bf82ed073d1b651cacead14e8c5414103961dc9e8005. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US6R21479858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97927756002cb90b3051e2c0e40bf9b74cf75119e797b7df9a7714350f2b8689. 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/USA371024329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cfafb09961b62aac4ba295c487a91c3ecd20241c8e5712abc10dfd54afe849. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QMFMF1414692.
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 0xf0767fa5189cd8aeb93174fb680320398013ed3fe1a8682bce78125bd2907b30. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US6R21479856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bcfc64356af6730825010b147ff26bae792d87a504c140da71e009832fd4fe. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/US6R21479862.