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 0xbd5260ea6ed8535d69b7cd1057676e1916aadd048bd1cda37f69d94dc5f3751c. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/94bee485-2950-42a9-a2e8-26833c5d2331.json and https://artists.proofprofile.net/proofs/artist/94bee485-2950-42a9-a2e8-26833c5d2331.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 0x3bf1138cbe6960f75a9386d47bfdb8f90668debf142f0b96155c5a6ce9a0481a. 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/TCAIM2473544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b409e1c55cb720140da70c02be994a8c7a326c0ba8f39db9733d1a2c40468e4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAIL2474515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a2b7bc3e429ccd8893cc197cc646f6499565b6de57466257efa2e86bd30c35. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAIL2473692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8a3c09b48a6c898bee74b1ff52f88e873bb13f37903285ad96fcc2286a31da. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAIL2478352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffb4f41150fb915177cb9bc82c64b3f87f375ebd40ad094eacc67c7ea111ecb. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAIL2482603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa95372fc44757dcca95269f1a70c67daee442c2ac0e72732d879429affd5f3e. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:18:41Z), 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/TCAIQ2420866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fc9f40daab9458e3ef22d8965be8a37af2d0014e9373fafa4410ffc3a213c4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAIQ2420873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877c7baca2b37e6eda6bbb69bcb10e2d3cf9d34a415a03d3dc8b078ae46855ee. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:32:33Z), 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/TCAIP2420876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a341ebd9672adb87bf003d0a2b2a1479ebd995a10437f14d83c6b7c1fc151f3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAIP2420897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21dc0756cb6ec43c0e839f71809760ceb0b62690d9a26046c0d8e13cb3813d28. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAIM2484149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d662fa44fdba1789ffaba9ad9b6ae5acd7b8fd30c2617cd59d53de742e4318. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:05:52Z), 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/TCAIL2494897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2710b12a2bdf0c86c6febbbc63cb66aafe96e0ce94221f2ff56b42adb15ccc6. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAJC2492757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7d4cac6da4e1635dff5ad9c0e06602eca8a51bfe827601b8dcfa51de63cce8. 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/TCAJC2492311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbea0bfa4bb542d0b4486a7c9599b54f1da096b3255503e648201e6cd681e5f. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAJD2493380.