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 0xde87b9d463dd2322f32a9fc82b19d31adfc1531a7295f805fa2ef2c66e2ce8b3. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2f8c956-41e8-410a-974c-1726caf46491.json and https://artists.proofprofile.net/proofs/artist/a2f8c956-41e8-410a-974c-1726caf46491.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 0x38308fb3844b08c1eb61fd34b2fab062ff478e4a2088a242537e1e182d747cc0. 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/QZAPG1817093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081f4756a9e1e34ee91f25e31b9868dbca99d1555bbc114a53ac4772dc321b7a. 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/QZAPG1817095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fa37a5e77fc9bbe15b7366313f486b8a2655593cd74feb246828ea0bda1e06. 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/QZDA52004079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9406a1feccc67c33531214148957ab4710d406121dbdd5511e1e6edb7c38fc80. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:04:46Z), 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/DEZC62037546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cb7254de13c2cb499bf2ede2e4931f44ec053191f71620ce2500f056b85292. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DEZC62042678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af19330b319f59ebc7f7110b3a1b1c07a4028b4d9cac67ddc04a30cc4fd565d. 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/DEPI82101235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b56208efeb93fd597077a7a5c6edb2bc75dc751b5590d66e580738ddc4a8b9. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:35:23Z), 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/DEPI82103319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0d34cda52d99a0c8d487330c14b39b15c6a81c633b1340b25fe93a11eb876c. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/DEPI82105715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02384d2fda840bf1305d11e04c3db4967574295246b2200621295a315acf213c. 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/DEPI82107490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc782f8095541e117be620ad037946ab874d05fa88373ad22cfe2327fe5a9c420. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:44:56Z), 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/DEPI82113631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf3c9ed1257dfab6a27b7735b577968e90df9e49ee2faed8052a70da997e9f8. 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/DEPI82114318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90666f803ec7a3859c16c58c7453add0259afed04e984d5efae338590993001. 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/DEPI82207968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdd9876bf5dc6000bdc8e4b4c6887ed53512e8ce5e3cd4ac3d56555c843a0fa. 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/DEPI82208715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a482020e18020201eeb6494d7246dfc7dd83cfe84be4a566b1482cb13ea51a9. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:31:22Z), 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/DEPI82208712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ca2a58b1653190bf442f0723adbbc4c1d1ba1d904417ea9b11e45e43c35877. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DEPI82305920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee8509309330af838aa15e96dd92b066eca68ae0db27b8ffb795b21e9611edb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEPI82323209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ec4d9fcec78d78a9893e955a06c625b4c7befa707245d678ed891b8a73fd21. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEPI82323210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b20f7c70985677518bb35451bfb0bff408d7e2417ed238a71e584f716b9eb50. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:50:22Z), 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/DEPI82323211.
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