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 0x4e63ed38bb6488996ac7cf10edb17c5ac657ec4a15cd69510ccf3286403d9ff8. 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/7a21c38b-c9b9-45d9-84e2-459f0277cfd6.json and https://artists.proofprofile.net/proofs/artist/7a21c38b-c9b9-45d9-84e2-459f0277cfd6.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 0x354a08f526418b37bfb60e217ec4bf75b596feb4a8e6fee572ea9152926b69fc. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/JPTO09621400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f786fccca46696c097d64fa000a073f78e87cbb4bcf5ad160a5a369292b3339. 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/JPTO00601569.
安田シスターズ 童謡・唱歌 オールタイムベスト 101
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102aa71e26b92a7ee75d009d15602f87285aa7201b2c9b79ed01526b88296fe5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPTO08700630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf43c9fa063cda85e5b477f049d003e416035aa4913d759c234dfcd98cb50a6. 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/JPPO01614881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a137c8f5b8329217bb9210284bf906e082d20d2b41f5e0337ad1a004fd91b6a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/JPTO08600280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12aaa95ef0cc7465825bd06108820b46fb816bf46e1f5df039f08bee6d3a50a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JPPO01615588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d8504b0e3e1ee4c3074892092fd6511d68d3a7d233a93ff78078a916fef5bb. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:33:47Z), 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/JPTO08600460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853c1744822bd76c6852c8f3ae68c913eb9765854484f0843043e1b427733f90. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:41:26Z), 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/JPPO01614887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4195963db976101f0b58882082c7e194241a1dfdd7d309a634ab0036f33d3b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/JPPO01614879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c55dd75ad82cff5a3a95a693670655e51a2fcd80cef572cb78fba0e7af75be. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T11:33:29Z), 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/JPTO09823330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc7843511b710a88479d0df35ef1bd8303d23311a3b7ec87d93789eef3e9d24. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/JPTO09063480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea043519a40ebb9bf62ac2debe4491aba4325dd3e169c506ff6fe9802c0f024. 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/JPTO09909130.
ゴールデン☆ベスト 由紀さおり 安田祥子
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6f95f51a69dae7808623d0f9a6441de8dbd280cafeff918c1962346ea3acc7. 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/JPPO01615589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102aa71e26b92a7ee75d009d15602f87285aa7201b2c9b79ed01526b88296fe5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPTO08700630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4d5f3db58fe2c46eb7b0d88a865570ff58a4b68bba2d5f5c005ba6081d63cb. 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/JPTO08600930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7c52047cb82c1cddf57616d4a5e2b233adba1259a41ee7f57cce40494789ee. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/JPPO01800712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d35d96ede25edbff781109a474f7977c77f2f1a5563498180642ade41a09f1. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/JPPO01614763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128033fc283e7779a46b93c90ba74162e6d8576be19b88c69b376c5250ad9704. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/JPTO09063360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdf2ad18da98450c0be2664b0af80a90eb730fcabdee23c92bcc693d82decd1. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:07:20Z), 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/JPTO08700860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7540751b10df53d188400258e07c7e96d65600738481244868073b6f3fa2e52c. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/JPTO00601570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51cd60bec1c2bbc2364e30830867089c7fc383a854d461b71525feb1f1a6c26e. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:05:04Z), 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/JPPO01800710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d1a794adec809454a3f4ac426aca15b344682a2ddd26161d2519a836fade53. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:38:41Z), 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/JPTO09062600.