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 0xd084ea199f6dc6274cd72d9ee455856a9b146b921ec306a49a08b49a2c6e4669. 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/860a02a7-af45-4870-a92f-83f68a7cac79.json and https://artists.proofprofile.net/proofs/artist/860a02a7-af45-4870-a92f-83f68a7cac79.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 0xb7ad647977b7db7fbb9afbb4dd5d6173bcab18deedb8b95d7fbc473ba7a65798. 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/DEQS91500756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ad647977b7db7fbb9afbb4dd5d6173bcab18deedb8b95d7fbc473ba7a65798. 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/DEQS91500756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725950b3475b7b1f03ef0daeaeb8b622f27ec052d846638330d144c05ca19dc3. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:35:32Z), 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/DEQS91500741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff59b8551360084a075af0d12f91ae07d4b4c2b09117556ad9ea1a7a6e45f1d4. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/DEQS91500740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396f743e5480cab6010efb7b51a1d7e6419847904991e07adc016bfbb55bbf50. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:09:30Z), 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/DEQS91701089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46ed6adcd63ad0561ede5fb62b4ce111e5b4c6f53105825ebbbfe568febc455. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:22:34Z), 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/DEVB62100333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3cf6d15c8857ca5f67570dcb4a3b92c3dd4c16e6389425c7247edb3dfeb09c. 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/DEVB62200364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf169589ebde99e96753447aa179b18e1c031001df2d53f90d1feeebb35fe9983. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/DEVB62200393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc334ce848378f22c0cbbd6e194c4c10c33f3d4fa65fb9c850f24f41883105e7b. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:42:47Z), 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/DEVB62300420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084e1642da7c158d3de0824094f57f6879bb4ae62def6e6b09a5b6a3b072f894. 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/DEVB62500593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ec6f63fad9011668775b249a7f74b5e1bec4c2620c9698aab62e88b3e5cac4. 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/DEVB62000228.