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 0xbabe6d611aa61a5c8caf677f322f2b534a3a38e6252d9c64c1761db7f88159ac. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff9a8c3a-ed82-49ba-8d95-4dc5874afd1b.json and https://artists.proofprofile.net/proofs/artist/ff9a8c3a-ed82-49ba-8d95-4dc5874afd1b.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 0xe59129b948cbf3370043648723d36fc7f0e8eed80d879d245f7f71a8ceeb9059. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBSMU5712122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2cdac4666ee30283494c66940a00e28f10cca76f9f20d9d6210291e5305ca0. 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/GBSMU6821475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb975e1de732e2dc5a4840eb1b088069a1f583ca94af6591b991aaee0888c5dea. 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/GBSMU5790445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacca8253d764e10fb7dac3a5cba5c02231bffd5862384e208edd37d2f06b8811. 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/QZNMU2250937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693487c9ae46037dd1b480fb679fb335c040127cafcf557165baae71e61a0d76. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZNMW2227380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de0ae7f713ffaf3396912b4d2b1b364cc7d2d604a4d873c5a4ea080ca1edadc. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZW9K2425732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e3d08408ba9f6326f53db31140d934c770f37fb368ae06cf8bbcef90530adc. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:06:30Z), 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/QZW9K2423666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0772b982247667a8b6e0aaccf06144b97002e069afc8aef493fec7717f94a0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZW9K2433884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45c990d6c4a9ea04343138611fe9e87826244c37e521b7bb0b1232fa7030fa2. 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/QZW9K2460910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0784f6618fd3f9b68736bd2c49150f9f6f6bb860e951f1de77d8f79804971773. 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/QZW9L2484669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f40aa15bd50be0c42075be0d1d77c03d078bda5dfce4db8f0a05c08a975d275. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/US7VG2553433.