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 0xeae28594c0311abd7674cf4ac3d4f146f7b50ea45b1c7050f65fa293a27a5d32. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8cea801d-bc81-46ac-9860-689834d3c5f8.json and https://artists.proofprofile.net/proofs/artist/8cea801d-bc81-46ac-9860-689834d3c5f8.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 0x007109b528be1ce7dd107c8777b8205e08e0015f905229a2227e068de111f9ea. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:28:24Z), 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/QM9AA1919911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3c5d26abca3bbc082578c176a61fd6493bc1337ca436bdc3b04ef7898230d6. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:29:49Z), 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/QM9AA1919912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35968aa4aa7b584f994c9e2718e365970e73058bc26e5a3cb8b604aab2618b70. 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/QM9AA1919915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231f3dd2c17876f66fe2205a1c6cfeaa8493e82c6517a241185ed09076737c52. 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/QM9AA1919919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bde583094ca65bb3470da3b9e8373373704184f597316a0946c1665a2a4c7c2. 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/QM9AA1919920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5a94fb4d1bc5f7139a0431aa118bb4150c1b746bdb6a3ef5a2e9269b25c9b7. 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/USUYG1268504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f2b2d371d81130476c76f455a2d030f60900926ba09548bbb9fdda0cc7b663. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USUYG1268508.
Devious Persecution and Wholesale Slaughter
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15eabfefbb6024d0a4aa426316db17ea218003eb044b02af37d6001604bedd95. 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/USAYS1200083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b3bf389fd165849afaae4641f81e00cdebf80eddfb16358e351a894f7f881a. 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/USAYS1200084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80641c381737813b6682ed25f9bf582f3a88ca5a6e99f25043561196df6e0030. 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/USAYS1200085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5a20255b8395d8c2bcc1c402813ffc30c79bf022db83f16d7e35e1dfef8977. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:52:20Z), 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/USAYS1200086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f128bbac4ef016b96cd90385f6c13cda34ab6d73cbb7d536f4380ac15f8ed4. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USAYS1200087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5174383544c0f5b10b930a4382d7e1f1cccb645b8ff10a4a6ca4f96e426187e0. 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/USAYS1200088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0342cbc1837f2a9b7f89939af6964b6988dfecfd81a8a97b762029cc7ff3fa1c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USAYS1200090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32bb8823110c49d01ccb9dfae8bb169d83994cd75702c9941ea521d0b37fbc0c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:53:12Z), 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/USAYS1200091.