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 0x04dd53cca1a3df299eede5591e44cbebc588713046768cd39c62d8a57aa101cf. 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/e1bb0844-c0ff-4e83-8380-c0bc9aaad40a.json and https://artists.proofprofile.net/proofs/artist/e1bb0844-c0ff-4e83-8380-c0bc9aaad40a.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 0x53151fc2e9efd1b4962d64731794b6df3426fd59c58074322b9ca62742e7720e. 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/QZWFR2373940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918fb47a8956a2ab8faadab9394da7d1848e2370a5418425885d9c0c01ca4bce. 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/QZWFR2373941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f2609961aade4ec13791635be39506e93d598946b7440a16808af04655027d. 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/QZWFR2373942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae08214c87263205f5e0240800ed9d9d508ef3c927838e004e75915bcb92c2ea. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWFR2383517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb604064054b54e0b12ecd9faee030362e49e9c06bdb0728549cc57336daceaa7. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWFR2383518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd33bc008b3db5cbc378945ec93c98a7dd248a81f11e68261c2e57548a3feed6. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QZWFR2383519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8ff7bd8e8ce20b076a450e5b0623dadac52910f015586a2d6324b45db947bb. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZFZ22406371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41592a3db6fc5fc11f8de30706f800eabfb7f7ae85b576dd76903d3577b75f6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFZ22406372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa40f413bd33acc624e233e8e2aa289053a3b7b6421d633afe0f8c5c5c653c78. 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/QZDA62473416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398a286fd55af8c7e8c704a246b141443d70ca80f0cad786141f35f49711d82a. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:04:38Z), 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/QZDA42452671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e45ebf3b9454a4888270994ef5f2ab43f7a43f1c9a88d8de356a69d3eb44800. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZHNB2464163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8048f3178da6713879baf676ed068967335bfa6c42ceaf17b60caaa393394b. 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/QZMER2405094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05134ec8d4c155a9b039e6addf6fd33c624cdb74b52ab3c8415a265845a337a6. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZMEP2401054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e3365421092ba1674d4295dbb03559a316bb2cb4e7502a0ca53bb2cf22e486. 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/QZTAS2430423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5c6caec8bfeb5cac132d0516a2df7cec036c6205ea7f3c24bf2da1e8084d5c. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTAU2436916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3326b0cd1cdc662a2d73c1db08f809e0399ed716b2b732b34fde8ddbd1673390. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZPLS2416496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2344c63c56d18fe0e1e23d86504981de157a5fdd69be5cede1628292c763eab3. 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/QZTBF2457065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf2e8bf86276b4dbae39c9518227fbbc3da14a7d9b6080c1a6a3d97a98c64a4. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZTBF2457037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eff24eaa5130a7b7b82138be3ba6190d343051594ffd37d7dc6a39cf80bc6fc. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZWFW2417223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa943d266fcb508131111128aa40c301c959895a587ef00ed20483f0cf7cd981d. 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/QZTAZ2540471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa380232bb1b257cc7549e12cdb966b09dc4c7503d30886ba02caba5d6c006d89. 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/QZWFJ2597877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9f8a8f2f13318325df20971338092ea1b9a1951f188161b7c341f96d3c0fa6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ772513829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ef85c8cbf4905d457710266c138c12b6332b55370e3f2c4a6728a1c07d1f31. 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/QZES52440366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31711086676b669edd155ee1e73a09de863ab45595b383047671274402a17b4c. 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/QZK6J2454814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f577e8ffcebbd3df8f8c0ce846c886f7144b7814107485148f322598bc40f5. 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/QZES52440373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d715881225f5eb4b59bb250ef013a7751f354457e24248adb223a0ced1ee39. 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/QZTBF2457066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64ebbaae25f9ce3fb762f1efc50fcfa81286b97d75ecc656f32862e9db7615c. 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/QZPLS2419108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f421ef12606294bcd187f85fd01b7c1928280f7c122eeec69a0a5eb28b6133. 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/QZTAU2436918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6954927823cf085ca7ae1f925a1386cda58927d06bac0f2caf8d8699918452. 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/QZTAS2433739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59603306ea90a01ae1d0480ffac86c4aadcd1d698b937c0a2f2f6e87c7cbb5e2. 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/QZMEP2401056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7bf6d9866f1f9dbdbc5fc33243a3a1151a1705529ab97c705384a271804651. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:09:58Z), 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/QZMEQ2409264.
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 0x0cc2a6c7529346e1fcfeff1adc70e2de5421efd1a8153cc6b1de6de30b743cbf. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZMEQ2409263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57a1ade30ccbb5cb5ab1d17f8ca9477cd386dab974f31207a6157630d7cd67a. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZMEQ2409265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641ca9bee3a688651e735445c51b10b39a90f1a9ce542f4ebc490826a74c5490. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZHN82483928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892fd7339924220cfc8a1b9923f4ccb32453b5edf5faa232c4a6fb366564c410. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZHN82483929.