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 0x6e48749c2f5f2f1544222903344eebe409398a4c5b38ae891b33dab5f1dec07f. 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/5fa12195-94a5-4354-8dfd-b68cb9995090.json and https://artists.proofprofile.net/proofs/artist/5fa12195-94a5-4354-8dfd-b68cb9995090.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 0xa1e23928941ce3d81567a321dd1a024ca25ccf996c800017dfb48dde9847e1d5. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/HRA040647983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04df2e84deb26c17150a4ceb13359194746da8c7e1a1b7958060bbbc28d62a3. 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/HRA040647985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f6dea138b696be35936b539d4f6a07648ac1083d14be7274dd863e0b0a3edb. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/HRA040647993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff38c28060a5292ab42023458d80535bc115c82f799a396d3ca3e6a8a1da5e7. 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/HRA040644606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e991f1fbd970bcd0f86b2512b59b80cb745076e7c5925798fe1f59a72b1858. 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/HRA040644608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3791f028e904e8465fb425352123eabecd1f89a58143b48432b0c67598947028. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/HRA041992310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a7970c96d3ec75bdccfac8ce6628e39d5533be33fc7f6edbbc80dec7e3f95e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/HRA041992313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49c59270db22e901710a08d97f68e4993e8e9a3bde98ada23cbeb8735dd5a6a. 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/HRA041992300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8dd2870f4f6579a0d472073b8c757755c66f995a55b6047436b7c5c03be869. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/HRA041992281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05f016e7faf79ada2618324a166b874c4d5b2a04a607a026a1937b29af42edd. 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/HRA041992282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06e821cf13c24e85bdc4c710e6aad14c6a70c9edf88d868cc857b36cd937a07. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/HRA041992283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0ab3de786c4fd93706625b932c1797f818b737cfa4f2770b97d7cb08d45374. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/HRA041992284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3739637411a47e9eb18f44a2dbe58daeaeeaaa6671e4dad41c3330bc61bc0483. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/HRA041992290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1725c32d07f70cc2bf9b980272f11274e43fc405d53791eec84632ccf8e94713. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/HRA042100503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0935ef67919a9687cc78c101ff1cc96c6e75b08d66e9f225ce2cacc9037f940e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/HRA042100333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a6d67735e5b5adb8c8874ce93364babc00e4d0d7d12f58723764167ef7fad2. Chain 2 (Bitcoin): anchored in block 957624 (2026-07-11T23:13:54Z), 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/HRA042100518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0935ef67919a9687cc78c101ff1cc96c6e75b08d66e9f225ce2cacc9037f940e. 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/HRA042100333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04df2e84deb26c17150a4ceb13359194746da8c7e1a1b7958060bbbc28d62a3. 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/HRA040647985.