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 0xa49533d904521a5b62655c2379c6fdeff47452d41873d350f93b20d5f512827f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0fbbc2d-3dfd-4e7a-afb8-5d9f62895326.json and https://artists.proofprofile.net/proofs/artist/d0fbbc2d-3dfd-4e7a-afb8-5d9f62895326.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 0x6b8f26921a9a9d95d42130c5840cbbbc7fb1a3ab6a400767536c8efc54c9b8b7. 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/QZP7F2237456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86eb92b25dc9255e1d21d658ba7a622393509896c07b58fa179f03184f4a1ad9. 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/QZP7F2238204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf34e089bd23bee4697b72ee781c04affebcc2fa0c1d15cf23c116dc6a286c12. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:24:17Z), 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/QZP7F2239467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0bc2df70015b7c3771149d7468614b8d745f4ec14e636a71d7a110ce42c25a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZP7F2241838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b975ae80099b42901e8d9c787662f27048a454d6e1847d475f4d71533864d4e. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:29:17Z), 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/QZP7F2242363.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7310e44aef7f0b0be96ef441495501cded0cfb9c72e2c2466aaf423d38a8647. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZP7F2243013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08cffda8c5a0fe76729eaf2471aed2d6e50d057c14de709fb618a08f62f0dc27. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZP7F2243014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4df1353aae6fd0d1892125e50007a910eb61fb791ded4a07f508e0f85075c88. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZP7F2245594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309e4d7e17814fdf8b9e60fd5acca61558ed52746e0664df1ac7db0cb8091c93. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:15:08Z), 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/QZP7F2245596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde738b24420f1e00350b0d4928749efbfe79f87bdf06e55f2e772437c4f386f4. 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/QZP7F2245597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ea5ae42328fa6a92087a15647d502c6c2ad74c87a7d41a7fff45896f0ea721. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:07:28Z), 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/QZP7F2245598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8816c6a21a27a6c8862e9f48b0a5c6895b7da17b4611cb803619433e4ac982. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZP7F2246573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16fe596120c6cf76bba248b3dff6406ecc34674e665d0a8100a7240c48aad02d. 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/QZP7F2246574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aaa375f7f1e22860b723a729042cf959654a6c8e30cd1d00aa2bd8330c1d2bc. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZP7F2246576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef78e7c223d73bf2d91044e8bce6152460780272144dde7865ce1a3a0aaa436. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T02:58:45Z), 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/QZP7F2246553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11967d621882eff4f40db50b5928d47387b6e61dc04f3fc8a60743c53a47ab9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZP7F2251626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45da21d489dba581a245b241aa94f0dc4f2d37b09fcef74c1983cdb000ff533e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZP7F2259370.