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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 0x2cecc618ad454dca0d0199aba132572ab15ba1f010d9ac2a0a5f8274d46c8fc9. 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/87dd7a11-c8cf-4a97-a003-aa213181235e.json and https://artists.proofprofile.net/proofs/artist/87dd7a11-c8cf-4a97-a003-aa213181235e.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 0x47e5d83f767bc8ab5b444c82ca10035dd23238599604fe99a2b7f0bcdf4d76c1. 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/QZK6P2111411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f159b25daff5c115167a27ffcc7765f10993b61904fe5a449835703b0da7c2. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZMEP2204245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88742ee957c560465e1d875e47d31ee17130ef1db0610654d702ae1b5c3ded03. 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/QZNWS2316069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3d2488bac01713dcac270d695a103b851ddca2fda3b465c2bb38878fe425cf. 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/UKZGC2304831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531586f394a18473780831806386ede19bdcc579a6918ab09adf8329bd29cdcd. 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/CA5KR2385939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac1f55a963e840cd48f0fc131212e5defd200e76e070b562577c9826cf19a2f. 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/CA5KR2408362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d820eef9675fc1abe7f12c8580faca3dccaaa87675e5377b0942f35fb06324. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/GBKQU2442632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3390c60758333e7516261665d75f99799404f395038671fa5e3cb093e705c16d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA5KR2465651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfacf03bdece4fd459e7124808dab8450a57ee9cebc67fffd89a60ec689d462. 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/UKZGC2406979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a0c55d5ab1718c2b2718696dbad3e7e107bc1d33c63089e9eba6e009604f86. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKQU2492523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8ab8a7a9c09b80be18ca14eec85436a6a78c3d58091f19a3a7072e02dfb33a. 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/GBKQU2492524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21efae54af4b9dd353bb0e4933b54ff7761ae5023d56d8c20ceb38f4501127ed. 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/GBKQU2492525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893778d01c06fbc08f4848300e53e07a9cf86e1697bdd43d8c4992c13774e651. 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/GBKQU2492526.
Cirrus atop Sky Pillar, Existential Rains
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c094f14447d4f44cddeb0b7405b4280bf691a362c7c564401b93633f3c88cc. 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/QZHN72221653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb0d463f70436cb8685429d3e3ac4b15d03376b38abbe0dc3415dc397d7ff17. 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/QZFYY2294443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143e63193a95183d65ab91cd5a3dba35a85cc3212341b7b1d177282b92d186e6. 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/QMANG2250724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4b7676a68cbeff3d43c4d9d43120bf71ddda1300ffef1c73a8c49f6e34c71b. 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/CA5KR2397749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94d20b3f2fa7e9b3226474a0908d344050ed75fa6a80925d32ce5d8d8cb2afc. 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/SE6XY2370374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839049bfb42a92ffe59a176f71205cdde80069b5632eeed00d9b567af58b6cc5. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZRP42210099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1655203768a9a97104d531bd5e92eacdc2d97cc5f29017278997f36484f6797d. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QM3DF2274705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a4070a4156cb83c4c9d31ea6166601f7b51fac0dc2a1b0878b1ec052a12c13. 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/GXD7V2586691.