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 0xbf85a0618dceb88bc87ec4bb7ecaf8b0050d0ffebcc2dcc61921ebc266b1e51c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/991e15d7-65b3-44be-adb1-dea549f19c31.json and https://artists.proofprofile.net/proofs/artist/991e15d7-65b3-44be-adb1-dea549f19c31.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 0x662e20c27559a71be3a30b14179a1dbec89e6be6bdeff54fc9fd2ee2b829d358. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:53:05Z), 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/TCJPL2014716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662e20c27559a71be3a30b14179a1dbec89e6be6bdeff54fc9fd2ee2b829d358. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCJPL2014716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50244de992f89ed849243f4a601de6e442613ab80e9c2064ab270ebb41f8192a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCJPO2100166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50244de992f89ed849243f4a601de6e442613ab80e9c2064ab270ebb41f8192a. 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/TCJPO2100166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155824c60cb1d98331bdad0aeb7ce9018d016f2298aadf5a00322166db4f1be8. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:01:41Z), 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/TCJPO2100171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027d51ab504dd4cafcf4b33541379eb8e9470eb76a24df5effd0f14e51fdf769. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCJPQ2118944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e73dfaf5ad17ab89a2fe6d2024cd7188dd5f30d2162bcd72caf14c0cfc0f196. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCJPQ2145631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacad8f14a39fbf1266c774f355587c90124f0ac5451ca6fdd12560be2165a73. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCJPQ2145633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702c4a32ff34dadeb5eb9197c72cebebe7535ecc87feea6b1252d5b4c51722b7. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T14:57:44Z), 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/TCJPQ2145634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af615628e44e26bef16199207490e5f71fd51fd6e13657a3f5bfaf8ebae3ffe. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/TCJPQ2145640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacad8f14a39fbf1266c774f355587c90124f0ac5451ca6fdd12560be2165a73. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCJPQ2145633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af615628e44e26bef16199207490e5f71fd51fd6e13657a3f5bfaf8ebae3ffe. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCJPQ2145640.
リビルドシリーズ①「でっかい宇宙に歌がある！」
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a18b3b9e209c372a8f6400d837fc25a4017892e2ccd1aafb157e6a247d1fa3. 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/JPTE02104360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398a29800f11a2128b9e9d1a6bcdf4c72faa77114d5b69308aa051219b57a862. 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/TCJPV2391949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11904137f8671487051f1418a8f74474c644ec61e4f8d5f9f085e157ceaba1be. 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/TCJPM2057197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fba3f5d8fd8c2c6626cc52b54becca259109cc85885b269cfadb6285f04100. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/TCJPR2246078.
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 0x3405c473effc4ceaff72f278aa813f201b856c3878b8651cca7ec8c06298f6dc. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/TCJPY2304086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab5d92ca8a8b2044cbf6ff3187e524041905276c21b375b751c737d505ba3db. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/TCJPO2198606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa9eb3c0cdd65aeaf7d471be0fff6e570c3b29072c47a672a35f41006244f4a. 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/TCJPP2193452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c099971a0174de125bc54a1148da0d7b20cbc05d807f742f4b98470007d34b. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/TCJPO2119133.