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 0xb55f236c31ca7b6ce07e245c93387ab9387e728695afc34f522626022b3576e9. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d31ad3b2-bcc7-47b8-ab9f-092bf60041e6.json and https://artists.proofprofile.net/proofs/artist/d31ad3b2-bcc7-47b8-ab9f-092bf60041e6.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 0xda5cb3f1c4318c17b782ae8e854762b25addb429c19c0a1db308653b20644f5f. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:35:21Z), 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/JPR751900123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa18a17c7bfecf68f8d67ad50464000c8727e245ab6080cfee6e34e673dcb308. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/JPR751900292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbee0de09e462a6ab2a97f5aa09d6284828ebe67bf59684c5c084535e407ed4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/TCJPY2369680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1579c843851f04671be147e8e2885e7a08750adb79cfb72197bf5b6469dfa01. 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/TCJPA2450545.
こんなよく晴れた日には無性に泣きたくなるよ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c9845172b2b0a0a674ac4cc4363e6bdc70f9fa5e2b2daf07b43bc3cee7c0ee. 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/TCJPF2560887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3766a0505e50199401abfdc0f9fa89f4f3866fb6880419a8e60edd710d720cae. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCJPF2560894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cafc95c1f65141ab9e63eb51896aef63b0ef68f63a9c60afb7134fe0d619f0. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCJPF2560900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad118209f4b73ab2d009588f0f6e600b385159ff8516061a361db627fcb5d20. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:03:11Z), 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/TCJPF2560913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0da4414bf91f3d58b051538eaf9ab8daa3643be45e02f49b095d74ac486d04. 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/TCJPF2560918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9cd8116be3a6193525bbe8875b87b3ab3c06f0fc9e1d30dfabe3a05b3f2eb7. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:25:32Z), 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/TCJPF2560920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2534a772ac7f1b28a86596a9e17a30f4a70b63af4565f7e5d7511d592ab70a. 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/TCJPF2560928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c9df5c3736d4f5ebdd9e93c5e0c2eb6c49dd55eed6761c2072931d74ff2819. 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/TCJPF2560932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b348c437fad57ce9b07803d71ff6228b5468e43c6162d23152adfe695f7b00. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/TCJPF2561032.