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 0x5a4a20dbc39e193c4b0f7bfed50fc915ca890c9a4797d087f17dda3184488c4a. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/805fdc2a-a808-46a4-891f-ce99dd60b707.json and https://artists.proofprofile.net/proofs/artist/805fdc2a-a808-46a4-891f-ce99dd60b707.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bemani Symphony Piano Solo Arrangement Collection
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 0xd5a9a8f80d85b3caa793058c9238fed8ed2c358c47f080521171ac01390af833. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/JPPC02110923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497d1a980d6b74d6704857d15f188b2327a6f6589607981a184b042c20a447e4. 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/JPPC02110925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863a3ad4ddb2f4c6e979180060d3d321fda235ae8bca17d23daff9ba816ceb09. 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/TCJPJ1981129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6840171671000ca5a98cded80f408910a3f7222bf83be1ceb735bd0321e94b. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/TCJPI1834449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0152e2f04ff9c71196edd9848797ef228836bed4b6ece0fdf6bc6bc7fb15a73c. 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/TCJPI1834450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453689fd0a677fff08af33dbe78154f926b6a81a23e4d409b2d986988ea78df8. 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/TCJPI1834451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d45b527787dc1bc8ad28e3c0560d563703587f7e23aa3fc76687d874ea887e3. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TCJPI1834452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd733b756237b6a169327f6ed225bb55f3d873e664b499ae84730639acef6a2ed. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/TCJPI1834453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a49c92289d0da76c574b0ca531193c99a6073523c0eea9ef1d697ab5a90061. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/TCJPI1834454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa80072b52677164c07cb2a7d143b0f581e3953e4cc27756c5b65cf505eeb304. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCJPI1834455.
Vieille Ville [feat. Ujico*] - Ujico's side Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b2c5589a265a5e407e19a0fffbe3f840c208efec4919f8ee3ace24eee0d187. 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/TCJPI1834456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db05b422b5b5fbb9dc853933a088d5b598f0a7d2e100099994525abf870ad51. 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/TCJPK2063067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44ab21ad3a85a4220929629ea48d8843c637ecff298cd1de592f30da25d03e2. 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/TCJPK2063076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf580d5d63c6e65ba8ca1760f19ad1b27d2ef6306a536ed2a655dd58e19ca3f1. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/TCJPK2063166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fa49b5d87cd0515c32b85fe2bfa74ec6ff5dd54ad5ef32254337f3b7f1cee8. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/TCJPN2167390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130ffc09c3b68b84d5bd64e410d03da830bf254bfb17f1f8d31e797a73a0b03c. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/TCJPN2167394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3082d1aadb460b944cc717eb587bb92ba2add32b100b013b839db0244d26599b. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/TCJPO2145298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa898449c064a02f514d22a666f60c123a77a7cac36966a9eb8bdc503535b81f2. 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/TCJPO2145311.