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 0x1f8a4bf77fd8d787098290eef9ff1bfb021581aeea1d1624af90fb49a0f1fd58. 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/7a153f68-6518-4326-8b78-b406595e91c7.json and https://artists.proofprofile.net/proofs/artist/7a153f68-6518-4326-8b78-b406595e91c7.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 0x80294906007a041e9c090442ebea2facc9d40ae0341480108ce1f682a9f8aa42. 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/QZQAY2429280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d92cb9caf8a06b42a7a0a9ea1e4ce0a5ac3f496e0461f5ea318867e227182a9. 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/QZQAY2431803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879a7d43286ffcbce60bc27dad2e23d0993861d22878bb1e198182b90fdd902b. 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/QZQAY2419456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc357a6e1abf8369a8e92cf3c0d3fe34900f9451e4be4a49fd357a7d9698100. 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/QZQAY2432320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903e6cc7f84e5bc9ef79c8584cd8dd08ecddb7aad47c9ad91a401fb104faa0af. 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/QZQAY2455835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8032c90f5ee56ad5cb17feb05f18fbcb4affd42dbc9f090cafbb02f8b7ceb26. 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/QZQAY2450128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b6d478a2fb8f48da53dcbbc8651fdee90c78736485e376365326345e048458. 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/QZQAY2471409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea62da5eef432af6d14123601440d28f2068abf7160e44e8dace64cd6065bd6e. 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/QZQAY2432488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2853b1e917ccb27be7dae5f345f578cfd7bff08827738c8a0c43eebf52497c8e. 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/QZQAY2497724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44df99ee9b4683615b6e2d518c538632f7c48d165009d2373a8297868712c37f. 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/QZQAY2493778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806510d2bae59aeb49c86788ea34ed533ae903b67c2fe61be0b592695df3583d. 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/QZQAY2499372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc169d666891774f2a985b83d15ed327b9a36fb623a754bb48f68c25b09e29b7. 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/QZARB1813562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef2d9e8558aea980182f28403da6978efc2ac25e4c91586ca863730e705a864. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZARB1813564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c17eb5dfec3e3f74be69fe3a997f4f3997537e1abc90758bfdba787b2f76d2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZARB1813567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec528320580a9bfbc899a1a270abb5a62e73e667a8b17b01c1e76a44aacc735. 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/QZARB1813569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903e6cc7f84e5bc9ef79c8584cd8dd08ecddb7aad47c9ad91a401fb104faa0af. 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/QZQAY2455835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879a7d43286ffcbce60bc27dad2e23d0993861d22878bb1e198182b90fdd902b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZQAY2419456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b6d478a2fb8f48da53dcbbc8651fdee90c78736485e376365326345e048458. 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/QZQAY2471409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176b2710a59240a09e0d9afc48b5c9177e903bca8540407ae4b08cf86d8d2d8b. 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/QM4DW1747270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56985f5543bb05b3a8c62a0d8efec46e1581ae016160a4ce624153b27610bd72. 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/UST8K1638243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e109bdb420859a6429e513b5dff7b2e85abbfd63e3b65697acb2db5144d209. 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/UST8K1638244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3762ee6be7bd8c0a2d173799a93a71fd0c2ebb6f3ad5ece893d44ae9c9831be2. 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/UST8K1638246.