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 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 0x3b2d9bdbc6ba9262c2f7bf03576ee6daaf74f7625daca76dc16a8d9dba1588e4. 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/b15b8a87-9335-4278-99b3-d11427ec38de.json and https://artists.proofprofile.net/proofs/artist/b15b8a87-9335-4278-99b3-d11427ec38de.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 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 0xde04106fe498f0138d19c605759392d09fb81fd1d391b057c6beb2dcc52aac10. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USCGJ2214613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24301969a82c3f0351c5040a9ff6db417f4272c182cf9e5d98d87f6ab16512ac. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZMZ92115416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd14a839a78dea2cacd5426a3acb3ab8ea86d4f49d59789c62964f9beda9a412. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJV2131455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d58e2d50b2a146435b0560e03a1a300b4de0264e5596273ff568124a16f02b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX3Q92093391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412f93924d84af3513e90afb3b279a82d88d27427d1c7e49652edf37fad3e020. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USX9P2003502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cc502b751e3d82820ee5fa50f5d7256f00946b5462a50b4c29b5cfa015ca55. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USL4Q2153146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1d88ec4a61bedfae999ca7f156bdd47073f01459d68da712ae2c5fc2464222. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZMZ92183824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050f90f16089c28fcd68449bedbd8157505a9968325b4475dd2b8970fe683971. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZ5AB2174947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3b4ce00e2fdd2d350583fc393cc5d97dbd4131cf391df7e0f39f825a6cfdf0. 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/QZNJV2021570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e8e44a09906ef3f40199f5020bcfe60e3ead782a660163a8367b8d981f939e. 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/QZHZ42167609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fcebd873f5cb2e074a356d1272866d579c510caa6505f1c24d6344a40b4b398. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZW9M2283520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e63120a8b32382370d24f9a448e5664821d9697217f1271b4fbe37f3c7f723. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USL4R2175801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f54439191561d518e25432cb940dbd456276ff9aa167184d809ef8a00b0a4b. 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/QZNJZ2227206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02127c4c16be9c6e304356a8871a92f4498f29cc971766bddb57b60911201215. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZGLM2134242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12c4013216e9d593b93ce21a973c0a1e155cc9d6d43a722beca03391fc8f0e6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7VG2022988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2616a9faf36f4f063d9d7e1ba1211aaca5e5331a601bffe32fac3e6810ef16ac. 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/USL4R2159463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a36a9c13a75c7fd8d96ddd4d68eb094b6e9fecfd7da303fd5539764f804dcb. 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/QZNJY2129976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a5c172f6eed492142f2425810e39f734df4ecd014122c0fd9aaa2ce6bb064c. 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/QZHZ62072541.