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 0x65768d169dfca6ff7031f746bceb3b3669066a273c0358b3984d1fc69306dd96. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b076e1f-3bea-44f1-a815-745953628eac.json and https://artists.proofprofile.net/proofs/artist/3b076e1f-3bea-44f1-a815-745953628eac.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 0xe329773193608d4825f00fe9faf2f4b452cc66fec3a42757cb05dc891984d5b3. 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/QZDQH2513029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605b368417e8b5f6baaf1b184600e29fe384351d49da49cc6e22888801aefda6. 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/QZDQH2513784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd2e14420db3e6e2e9072d86c36fcf8d007f65dab1fdb4c379c7645edb01dbe. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZTBD2551522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffffcb1a5dd3e0e42462f21ececa169e0ef7ecbe8d82163e658bc86cf79a52ba. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZTBD2514759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea698141de7a6fe1f722a1b2ed30fef5a88da7e8011aa561a836655124f2f98. 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/QZWFG2563002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f00226b909d504afe6fcd1d12b6c42d7467e4c4f142deaef659526eb5f4844. 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/QZWFH2531836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d0353022813c6c70844be0a77c90043550edce82ce23d5290a86b3b430051b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFG2563041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4779d4495b918816c6607c7c14c0e549ad7cdab1a7d275377c8f54d2a07f33e9. 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/QZWFH2509430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca945b3d604c0931a356b75c08dce7640bfbd39671fedd6e92507fc54403a330. 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/QZWFH2511316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e709ed3491f6c798e61c1cf9d1fbe5b38cdcc32ff495a0c671e31c5e2ad0a84. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QZWFH2506553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe92aa1f19113fb0902a9aa0ac6dff0c42f00656201f6a07e238472c5238ed6. 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/QZWFG2563056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b224913296093b16e825c2b8e8733f2115a628c1a9a04b32409ab2c950bbbae. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFH2563523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e44cebdc6d5d0361984a1bba9cd9fc0873c1ae130c67d0f633597cd18f9ccc. 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/QZWFH2563516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce72e07f273e640a3d8c7d6a2c19bd7526b1ed2f4966ffae7618dd9f1335fd8. 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/QZWFH2511378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09426e650f8c545e886397748c8dca2b01657b2e600870e3143ccc9a8e29328e. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:58:32Z), 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/QZWFH2511393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424bf9172ebbf12482fc0e83e9c59d2a7dc30e20244daecc80f1dbc285812686. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZWFH2513828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5c912eb2c00fac1c16caac6f3b285db10042d63389e47b0c2246af74f47bef. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFH2511374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66b61b636a46bf5d9ed4774993f9a0f2d624a30b0c26b15f5045e63dccceed1. 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/QZWFH2566492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296a49cf465fbbfa69a772cd6e3a258678a69f8f127036877c6ff4ac41035bdc. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:41:43Z), 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/QZWFJ2510871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd035f3e79f76d3d7a8f79236070c64cfcda18a338c774e7e3c410d2b79193b23. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:18:12Z), 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/QZWFJ2513610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b436b27725c723f0f4eab121b671309bce23db48f9c8b5babd935e77ba52dd. 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/QZWFJ2508097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13531ad5a7de994f5b3bdb215db629cab0138846c8323588ebef3a041c5adb48. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:10:52Z), 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/QZWFJ2510925.