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 0xa6f96dbd53647af25fe743bc96d61845b06e01178eb2c2ca2a6b1fcb2034c901. 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/61445b92-3206-4146-8ecc-066a8911882e.json and https://artists.proofprofile.net/proofs/artist/61445b92-3206-4146-8ecc-066a8911882e.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 0x9fdeff03434ea59be1d2f6061d88dbbd413e7168d2c90842b2729d09c7e15394. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T11:56:30Z), 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/QZHN52359390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939cb87e2d07ea598c9b1a50ae198d10fbb204a63636bfd72ad216a65a26b293. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZES62467966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b8c04828b281e233b261aaffb60c1380cc155a43b263d045dd66aff66ea391. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZZ8B2437297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7751d3e45d23e02f0ceeb4ecc7a739a317a317f848cfd8ce006866c29143ee1f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:06:46Z), 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/QZZ8B2437304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43420260a70050728e2f6a9da8c974980a7e4e24dbcd5a4960f67246529e12c6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZZ8B2437307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1aa87405e7d065d8fec95dd7e3a5aecad093fd50100fdaa480258643911c47c. 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/QZZ8B2437308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83948f2bb87f6e8f0ff8f6c387130fef7ac7847d71e57f98501ad4782746448. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZZ8B2437316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b8c04828b281e233b261aaffb60c1380cc155a43b263d045dd66aff66ea391. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZZ8B2437297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26ba672861a155965a74353d41c18bc7f53e5ad81973f446d6306eb2ac7b936. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZZ8B2437303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7751d3e45d23e02f0ceeb4ecc7a739a317a317f848cfd8ce006866c29143ee1f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZZ8B2437304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cae8e2421466ace6356e5b5fb19bd19c4dcd2283bd4e606c0feb8bb26b2b707. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZZ8B2437306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83948f2bb87f6e8f0ff8f6c387130fef7ac7847d71e57f98501ad4782746448. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZZ8B2437316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f6af9fe5d21816a95c2ba372dadd45ade7f1af89238d4169553233b91fe4ca. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:00:42Z), 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/GXBNP2509841.