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 0xca648510b79c9f182d8b5e5854edc677e50e9dc9c3b2c68f5ee516adad4869fb. 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/8deba549-bcd6-4fe7-b85b-ec70bc9615ba.json and https://artists.proofprofile.net/proofs/artist/8deba549-bcd6-4fe7-b85b-ec70bc9615ba.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Thorkell Sigurbjörnsson: Short Stories for Flute and Piano
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 0xa266d879584402bb672332bcb5c583500684bb924fbc4f5d573afea29f767f52. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZTAY2370099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d37308cd713491a782a8f6f4198b2f075c47290e1a76305c798901349b5d2f. 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/QZPLR2151637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1381be3dd49e15db4af6a816dd84e48281cd45ae5c0c0888da7761da07e01b1b. 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/QZNWT2131795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d0d3cb74ffbf448ac5970384557cea58dbf68178a81ff4be84f619b9927fe2. 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/QZHN52154344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04b5f2b64be76b6e08b3e67f306530b434ce2c78e593ae3d95a10740b191665. 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/TCAFD2020665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8e92e3a7e519cc6a91e623d124148827477fdb314af621027ef1c867766fec. 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/TCAEM1907278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060fe36788542ac168439f1b6182da0375accad81011f124de2bc104764f8c49. 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/TCADY1894845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5322d3c661b4bf406fb3eb5b3c18489ac5adb327ab1d5ae659e66067a921ce. 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/TCADU1888108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814713d5ed35da5936568325809ebd42f1c07591920c523a994b17c8024a967c. 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/TCADP1825772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983b35f51650f76fc992e130425a7a49e83b97cbcff0bd90ddec2989c15a3cdb. 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/TCADO1817147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555e1a4245b92c72486a4ee71a840542be8491181cd856721fc9c043ba8b559f. 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/TCADM1889456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af948c9583cad9167208a097b45092758f4e270f25220e4e91ef5fb84ad40f0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCADL1835693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9498f9dfbbe4329ac2649acd5f192b05126ec8c8a17e42d93118b6194a9f1156. 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/QZ9JZ1785690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325b612b5f96b824c72a311689f4c36c0ec67b9842ec72308a9e012d13354bb2. 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/UST8K1644852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ee4ae9cd580359848e0297fb690c57cd50f9141cfc836fed77546c616574c2. 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/TCACN1671825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b7d73c7e59bf12c9272afd3e33be0fa3962af5d0b7956e14f146714f70d66b. 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/QM2PV1567452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f81d03f83f63e4e07bf6af2c262902ecfe3a0aa5a3ade729f8103e5324e9d8. 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/QM2PV1504366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65519110951e0b0103fc3fe4dceac9d7981ab1279a2c021a03bcbeadd9b66f99. 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/QM2PV1502119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf7360690cdbecf3b481d1ef75b7b9df428d8dffe9d8f98a6eeb289b5d5c23b. 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/QM4DW1522323.