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 0xe0c08c54d0d879977474283fb2d9dbd80f74d87e92c99eb95faf9fb786d0a724. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e11d0ada-6004-4874-a8ca-b31602c3724b.json and https://artists.proofprofile.net/proofs/artist/e11d0ada-6004-4874-a8ca-b31602c3724b.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 0xaa4b525ff2c9928880c8da911552aaa68ab62b2873efd39e0b02bc5e5d94763e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZPLS2243030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bf8c1a15981420a1dc90acd7210bc573f264511205d8bec3eb3f797672bb54. 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/FRS182036269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ff3433cabd1c2f7d0da10a41b501097e5ac619ebe7930bc92f8af2b3eb5dc7. 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/FRS182036271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa3b61440a47d46bc08842b57976f1e42febeb69a67ad65d8b0f5d0db53c469. 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/FRS182036274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8130d9541e48d0f88898ffba6c3145a2747f38b68ed14abcb65d6a7d6a2c92. 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/FRS182036275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba7b9484f615c6a631e05ec180bd0ce256cdd78bb7bdb8f18e4e033bf76aae7. 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/FRS182036276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60414d27c245fb10221282c789e7031a8aa21a7024dab44f037fbd9fb2b8299a. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/FRS182036270.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d18dc3d2ee6e77edc4ca35042fb02b50b02d1e0b8634cc8801d6133d6b63cb. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FRS182036272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe347938e4e8b52a539ae70f968f717c8a8c4c4bdd9ceee28a3afd1365fbc319a. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/FRS182036273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5c47d3a64676f6f7ffc7041e6390b378c1ecec84ddff389eb2c6f46d3304df. 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/FR2X42249815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5851f221d9ba5fd7be6c2a25c00476aba8322422a65bd81ab118dae123d3558b. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-21T16:24:08Z), 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/HKD012312321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299a35e3ad9b4c3e173eb0b500fe21583c957add8294bf34ee1d87edf94b42bd. 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/HKD012312315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff5f90d742f716ef18912413867a2d59194376ea00ba0ca30dfd9b635708ad7. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TWAE32302971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa72b6367a679ddf2c80694e653205511fd3dfb7423b059eca359a7b0bbf8d4e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/HKD012312326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616858029f5d98117ec34b3dc01d45e8c933739749b3d6c09973df38906dc6e3. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/HKD012312317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314d34db6a6edb9b061061bd616a9ae4b99481831d693fa7dc0d1ea7b18f8761. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/HKD012312323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d486b01f31b04da0e2d776de391c6edc75ba7aab85ae902294d634fbb0e6e7. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/HKD012312319.