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 0xda91744fc7433c6067328aae6ccf31715445be018cd6d99e80c46c08f0d3c14a. 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/37fb828d-aaba-4101-a4cc-95e86bcf69d6.json and https://artists.proofprofile.net/proofs/artist/37fb828d-aaba-4101-a4cc-95e86bcf69d6.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 0xa18624cf2ca02ee9994af9eb5576a0f6dddaf17f051ba2d2902d15def2d3bc73. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FR6V80465235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951c3095818ab32854fd1c03cdf2ae775c07b67ece2342ff59e227ff800fdc95. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FR6V80465227.
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 0x854a18f8ef80c1d0ef13cacb0099f6d02e6ce7831d56abf539c569c90312d384. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR6V80465231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92e3228dc4bc06a4d5ddc1df77aa70f91624af448732e01e57ac00f0fbce071. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR6V80465234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50223f2a69ae501abcab4729c7e1aaec32faaa4d236d05b50208a52a5a9fea5. 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/FR6V80637316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fe6c2303a7066950e582a747f3876fc0129c99f2d83c936092f60717604fba. 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/FR6V80637321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fa1f3eb1b57c6bea226dec1863ef86acdc78cb0ca614021938c534f1fdeac1. 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/FR6V80637333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53396d429c5e4c2b36c126342cb0440037971936358d28fa7a0f0bfb97ca0e5c. 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/FR6V80637313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa360a4f93f3f68b76d45d8aac677570cf888ebf70200a1b816ea80dbd7e18a9a. 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/FR6V80637283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1db661e02ed2498e2b98d2fde0f7a109227a8a967e0d3f0c2d3b92cc00c9d5c. 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/FR6V80637284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe38a91d140e276f6518651ed3a65a0b15b5017dfd2205df59261a460ecaef5c. 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/FR6V80637287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01aada9052e1d506815ac97690c31f9fd6e218ffb50f3df1336c401d8b9991cb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR6V80637292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb480b0cff9da48affe08df24b22f27a90d2583a01495e3435a63188cf44dc34c. 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/FR6V80637300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd93203b4121d212b48d4d0838b1a0024132d2578990aff74d36a92473ac4bc. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/FR6V80637286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fb2c425fba8d2a0b340dd338736c390a6e1bb7bc9a471ceb9576e24af5b3d7. 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/FR6V81194312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05191dd9d770dc0698f6a0f284792c625325d241a41f67a45077157a79d9c9f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR6V81194313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7f4c90da9d3755746e585e3bc92d2ac2e74ca241a4687b986d659096c19bfd. 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/FR6V81194314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7019ced79304d627f683b3bdb4834f384ae96d13ac06d151a64b49084077dce. 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/FR6V81194324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4de7275dfc05a4e1dfa4fb1d863e1d77f1976a39fd0695b64a39ec65153ecf1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR6V81194325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50c1325c1e54f71689367e74f69ec7a41cee45a57c3e2e36cf5ea4493acbf03. 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/FR6V81194328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcedea4a4f2a791ce3a4df38bc588f8df56ef3e81cb0143535db401ca1a0864. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FR6V81194283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56c1e596f0ad539bab4379d0a1012c227645efa351d092ac7806d213a0503e1. 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/FR6V81194284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1c0836a22805e9d3743f45e6a48b69289d696c62f274863091ee21e8da5601. 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/FR6V81194285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812cb75ada3627e9415bc1a81acf690d4e4a24908c735a81780c99c788df4e66. 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/FR6V81194286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3450e512e0fdfec642d532d681e8a50600f69a07d06ceafcfd95a4bf157d03. 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/FR6V81194291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc69aa200fe2b5ee011c9b7862d96e12b88f4f2a0707e533b55114ed20602d7. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FR6V81194282.