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 0x6248d22cb72e41e5f48f87a9749676d578f1ab3bb1e2b73110d69acc162bce72. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8aae8b3-11b4-40c1-8dc9-09799b157c0f.json and https://artists.proofprofile.net/proofs/artist/c8aae8b3-11b4-40c1-8dc9-09799b157c0f.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 0x749d8402de1e64b284662e9e62f7496a2e24231c7c9e6331bd8772e419407561. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/DGA052316630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc9a466861a7e4048a5c8f7875491acc3982e707c93d7999ba66d2ceea00d2d. 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/DGA052316633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8328f474d77ef3a813a0e021cf50a5baa0c422ec8772c8ba89b2628271ce5583. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:53:41Z), 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/DGA052316636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993efc918b373526a37277416e1cb0519006f558d884a5bc5ea4b32d12b9e47f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DGA052316635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9838596d8d640522eab5b36552c706e1567d82171545d21fda8b8baa3d25ab72. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DGA052316637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde8b76e03dcbb4789241dfe4ad43fbd1675ed064f4078086df60e295d10d993. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/DGA052316631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65295d82140f9fa0ecde650ef4079410c0f2fd149fa153b76f502da6a5896feb. 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/DGA052316629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85e6e08d757603dd15d018b1cfdc74dd7ce37aec685e4327b90b7783f2a1135. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DGA052316640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf4c7b518d416cd6d4809d4062e312246bf9b9aaa36e2a873c89286bbbd7de9. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/DGA052316634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd912456b5d787924b45e1eb542332f0c2304e3431833a215c020a694d8b966af. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:06:20Z), 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/DGA052316638.