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 0xe086b8a302cd199fecdc74ef6373a48a3d9c5eebc84dc0a0485e301f268dec4b. 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/8ebb26e7-c8ef-4a12-a2c7-838732ebbd5d.json and https://artists.proofprofile.net/proofs/artist/8ebb26e7-c8ef-4a12-a2c7-838732ebbd5d.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 0xbe11312dd5bad112e2b27cdb60b70d1b6efcd54d8afa89a6632dd87ffcfc6202. 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/FR6F32301610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5eec96bc52d3583e4f0890bc098615b607d1733ebf305bc8301aa8ed048f7e. 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/FR6F32301620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf950973c2771c20f6a2d09fb62e7b91b945dfd1e520cdd640e9ce30b4e1bbbdb. 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/FR6F32301630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b09cc699638654cfb1af134e50d7554ef18adbf75367e40604a22ff88e9a8b. 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/FR6F32301640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c629670cc39efc1024a854aa99a95352b5de3f1ef434879a9281cbb0afbd713. 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/FR6F32301440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99e29ac5054d7207880d448ee3f0f56b2ebba105209d3feabcc5560cd8aeb0e. 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/FR6F32200500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510c6a59eb2edfd955f6891d7cdb115dc0fd1c7ede55fa4b99442ca0561f1d02. 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/FR6F32301650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4822ff8f4f6683aae8693dd7df7a768c6f77fe8a863ab6272e8416f863cbb91. 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/FR6F32301660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4a96841ecfba8a5e569edd0755c5213de19ce088133d6769863d8709c04de1. 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/FR6F32300430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7824dfcfc540562e67f5f8dea92a94db74e7c80062fbcd2f1cba9d65a3dcda. 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/FR6F32301670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09175fe1432cd9b5cd620a265f7a49c5340ad17e7a6a60befd8538ec140c4ebb. 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/FR6F32301680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605565bf725d7c818b4dc3745eb4e1dd2410369244b49818d9b10c7edafe8a16. 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/FR6F32301690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6ed5e4e704ca1d10cf2a214ba3068d999b5e8a55a97b7a1f1714db8b4cd999. 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/FR6F32301700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc682f5f0a7ec6dcd02d7633146841edf0e9617e6c00f5e9c720c3bf90a5e7b. 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/FR6F32301710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c1d7edc4e70232d81f56e26025cf80f8cd27afa456c84502ae33c7dfa16131. 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/FR6F32302210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5bb00590cfd15d1924798b5238d34c0472ba45b1456944e032544dee4448d9. 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/FR6F32302700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90731e2751913b39c5d2c1b81f41423a2c0a593599b83307822f52f19b1cae6b. 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/FR6F32402820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5bb00590cfd15d1924798b5238d34c0472ba45b1456944e032544dee4448d9. 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/FR6F32302700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4822ff8f4f6683aae8693dd7df7a768c6f77fe8a863ab6272e8416f863cbb91. 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/FR6F32301660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c5dae138af33ea94889ca5cfdf7525bb8e23cffe94d14dbbe600a4d507aa77. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/FR6F32200480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d0f6febe935575b5d68cb6516a4274f7633398f9595f39e6bf5337f2977d9c. 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/FR6F32200490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17dbc7ccc5cb9492eb5454b216fc4bf80a5181b9303cc2d802b4b2a2c8beee8. 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/FR6F32200510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30eab1364211338b2a148da49c98f8b27b9c1252d6fb117a8ca25fa329af20bc. 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/FR6F32200520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5514ec932a37ade811e5b384585d4ecee4d4db066a58a317722003c1d6b245. 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/FR6F32200530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15ef3bbd7aefac16d51a724344977bff409f22e736686814ebd46b4678f0baa. 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/FR6F32200540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d0f6febe935575b5d68cb6516a4274f7633398f9595f39e6bf5337f2977d9c. 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/FR6F32200490.