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 0x7eb3cb6c69e381400ded4dd70258b4462baa778ab844adee4de639dcede6e54c. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03cccc5a-be9c-4178-882c-79705af85044.json and https://artists.proofprofile.net/proofs/artist/03cccc5a-be9c-4178-882c-79705af85044.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 0x15d592b59f9790c3d4f7b7c8f207e4f69bc6b598f058beaa9fcd706c5f275597. 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/QZS652261590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3014e1e9a908af05350c003b934813c0d242a2fc9d8869e1d8f32b61bd2406. 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/QZS672231674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219b7e3bb1daa802f48e846f7aa49b70b88b571e47c8dd84a3140fa84dcd18b0. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZS642290406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7916873b2f5d58d247575475d089468d4ad5e7f2ff11843147f7744a7234e0e5. 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/QZS642248206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d55de970a21f3e42632694f2fb31528e724b534d331508d367773a8bfb02a6b. 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/QZMHN2273936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59251f72d00cf268c775fb665664906175ab1c63de09b4801e4832d4dc53a41a. 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/QM42K2237899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c49be83dd1ce6eb1374b7cd635b94b0296e3a0b6f49456eb3324a453b7f78a. 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/QZS632204130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bf0110be8250f95483d0bc02cea7d1dcf928638d66b243a9d25e3858c17ac5. 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/QZS662270156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bda71370d9b74e185b2a6f29971334b2c206b1affde1ae31ae11bcdfbc52146. 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/QZS632278543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6f1dededb959178c7c13a71598dccc8d1ac29c297e01b9c20b9fd01c188c63. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:06:12Z), 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/QZMHK2231409.