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 0xd070d8d1b9982b6c353ee564239990541968ac97b4ff5c85a47e259b1ebb0772. 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/04d24d66-92c0-4ced-b8e2-6410a911930f.json and https://artists.proofprofile.net/proofs/artist/04d24d66-92c0-4ced-b8e2-6410a911930f.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 0x43c35a28d94f139897c02d2b1f774c679bac52474e0f2265731448196ca72d33. 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/JPM901800052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cfebae659740b1a0d6700f266eb79133de559c313faca7ff8a9d7325bda131. 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/JPM901800082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5679a3ec066707c0ae1122fdf3f26364ba94050b514c9883f628fa394a1f5c65. 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/JPM901800083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a91345bf0816983d9e739a45a98c445065a30afc141853732cf322bf6e7debd. 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/JPM901800085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc4dfd33a4c76af520bcb4622435ef93c9c48ca83ad08e479b55c2905b1662c. 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/JPM901900044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710bcd0daca217fc570f419a1a850cffed24251e7b2d61ef49bbc276f88a960d. 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/JPM901900086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd8413d81dfb03f79d68ef5999b4c3601ab23be98b60731a6323b0f983e0e14. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/JPM901900077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbc302170544f0dabf5e119a9155c1fddafd3c012e0fca6874bc6b077d2f831. 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/JPU902002633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fefff91abb151905ecf7b32aa7b93e4cb5d102c882e541ceb3deadbd307ca6b. 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/JPU902002806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4448565de28e86bdb06c2d80723deff65d2ed49b76a96df786bed69b64e5e5. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:11:14Z), 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/JPU902001461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b90f7f47d2e2dc76e0f35217f0a1588bff6a4896f45cf8ef4032154da9e3296. 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/JPU902001460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe7c4a3ce7b30cd60ab5cc88a0c3980e74af7bccb76b13a94cbb00ee46c0654. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/JPU902003178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24429e1d7f26bc5a0935b742799e2460b0991bf1e7b0aca7af05928f740737db. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/JPU902003181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7014fbe3900d1e174a6e07b2a08e668db54a29671765e17533ebe5b1ca1fa7. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/JPU902003182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbc302170544f0dabf5e119a9155c1fddafd3c012e0fca6874bc6b077d2f831. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPU902002633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f00026c1e703b1cdb223c191bbe4a3eac96309bca0ee0ea3cdf5767ea29fe63. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/JPU902100477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885a3139f2ffe9871719c60565ef483865f5731b283acc484374b5330967155c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPU902101749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e41b0916284be2ab38c2d70fc65f50927d105625418dc7077515bbf99348c30. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPU902101745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d60c9c8696573fa843d2465ff0f7ea6d96b59ee2ea31d6ebe23faa7a80b6b8. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/JPU902102760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36cab57b9ba739f9ee98f1e06e3133fc1c89e4df05a4d9b152bf80650348962a. 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/JPU902105582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2b2222790b4f6b98bca1a87bfe3f71b7f9b213dd860a2e1ea82ea0193df198. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/JPU902105580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ba0faed38d7b0baf91d96d107786900963a4fbe8a35270fe0d9ec4924a5c58. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:19:43Z), 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/JPU902105581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d51d579e603ec319db1017a798269b7def4810c9b7c87c182515c79822c597. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:37:46Z), 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/JPU902105584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf7e0ea2120503b827a6b6dda08b20f70a02c2f240d9d8d2b7141c3410ea4a8. 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/JPU902201961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0df9c0a30b55780a80de2cdc0b4e65b1c188653fe17b25a0be6772d8630bc52. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/JPU982303320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe670215de9245ffafb9c17f6969fedc3cb083394e2a4de131052eb4bb04cfa8f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPU902302845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa570e09134e87866d55b9be6d5bfe4ddd7b7e507b9bf9d4b745aa9bd92a092f. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/JPU902302846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806b6eb1e8a5bfff4809d584503dc63fcfb50eee69b58c252f92d13e7a88c899. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/JPU902302847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295ba6b9ae5d87f5ca5c39d8c0ac3972379a3c55614b45eb1f22a297fb75d1c7. 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/JPU902302848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96b5db612c46f9d9e70d9a04ba03187598505047ec8d5f04623fcd633e7beb4. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/JPU902203691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf7e0ea2120503b827a6b6dda08b20f70a02c2f240d9d8d2b7141c3410ea4a8. 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/JPU902201961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751f17f63149af91e321ebc7321a3c9ce4b9772bcf888353c210bcc36f4ec6c1. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:39:03Z), 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/JPU902302849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a420c34ed463b2c4837557d656ae392c39570823e3cd46839c2ae9cc54cf2d1. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/JPU902304975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf864d2f3411840e3229cbac7572cfc320303a44e443714c930cfdf2e14798f6. 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/JPU902401362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa037ff55e3e0698df28164a89b7f13583f214e1c05517999711778757b23dee. 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/JPU902503412.
A Spring Monkey Song (feat. 崎山蒼志, SMTK & 小田朋美)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99487a306923d4145f35cd40913b5a7a730c04546a208f752da3f6cd1491cbe. 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/JPWP02100708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274050a2325ec320ac17a9173c43566d09a6f999e09c0e9da89f793be97299f0. 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/TCJPU2358512.