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 0xac8997d0c517566d5ecafef37275575b624e5e2e054fd720b4bcea09a6bda314. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c884dd0-d6d6-4a30-bc26-9bd01d486d9f.json and https://artists.proofprofile.net/proofs/artist/6c884dd0-d6d6-4a30-bc26-9bd01d486d9f.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 0x8135ea5d677a7f46b3c53e986f7701c8160904d17d7949825b400058e7d29aea. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEZC62404901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118130cf3ad2efb81d0f3e57a941094d6bbd680c44b4d18d39c8e6aac2c8f7ae. 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/DEZC62402656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3447d1e04fbfb0991693ec4543bb07d8726826048349532f50f946fed7aac8af. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEZC62400213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e84c28923cbf9cbc7e574f74b4982bb032be0b8a17cd673c472c90253238bd. 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/DEZC62493039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6ba0321f3825166690c23332c5318710c85c302865e73105652f72ccfd50da. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEZC62492384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e59675f7b5390bdfc74a76cefa1da95860bdbcfbd0eb028ca254dddc2dcb88e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEZC62374625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cabc3e6e0855e41b5fea735dfd7da82043ed2527ad97d512497edc4810edd5c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEZC62378241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310c6eccbfdbb40f5f2a2f568c41a18fe26e02d1e0582e28b22d021c9b394a8a. 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/DEZC62350000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1c2bb7f82d3267ae29bbc28c544dc953169d849d56deab90cbce93df248186. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEZC62363738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3f45e8de798dee7554de320c84c5ab0fe645b49c56f2ddde8f57f3956bf3a3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEZC62357042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06bec9dc2e485cfd4e54393b368a7421950fb64856996fd4b54665fe406a063. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEZC62329482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a58d53cd9af9eedaf55f3c18c72c812fa6feb10bc54e6d343ffca993f4664b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEZC62320572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5354344847deed2913f37fa254005d7fd929ef73cd1770ac7973b43635b56a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEZC62214244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65c91adaec146cbf6455eb06b1eb54318e7c4aaa664a59894a7a56ca079cec5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEZC62205025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ac9e588b62d3242cc63bf089f5ae35002d19e486bf9afff5346c66165bef08. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEZC62204009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2291fc8c0e9f85bd600315cfa933d0acab160e8eee9b7be10812027cdb97003. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEZC62450992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b6f995c113120a6bf6ae2119c688d454e8392f6f7b7e84a74ec63c66631dd1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEZC62444135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ca8d1680e296b0281f849869a853a3ce388c888348f1bdba0ac2bc3615a743. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEZC62440290.