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 0x1abf131ce064563c6289d928154d6a4eab2a63b16c6c7216d499d79fad494583. 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/22b5f394-b593-46ae-b4c2-6573d600fc0d.json and https://artists.proofprofile.net/proofs/artist/22b5f394-b593-46ae-b4c2-6573d600fc0d.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 0x641af7f7d49d3bd65af48d83a394046bb7099b8cd1df63d2d5f410db8aa49e6c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/JPE872204387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d4c0f26c0c1b068bd01c2494d8c19529b9442d976a3d02ee91d640239845c2. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/JPZ922003485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d631b925a62537b3458550deb77ace7bae72a0daf459026dedf6653109d8f5b. 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/JPE872204393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b95bdf986f4eaf546ac2310e2c45f6ffee1b54e0dafd74c5b397494ee93b248. 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/JPE872204388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01fecd0eccc4d86ff84e7364c178fc9f4ca29a104cd941157875373752f5ac9d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPE872204395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44dfb934452bde3c106a5f6b28c6342fb17c73f693ce6ec71e03527c61e03399. 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/JPE872204392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cfc7512600454db3e634b3ddc5d2aae7bd98b8a31cf505d585d03bfa20c172. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/JPZ922007636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5217ddfdf7cddbc88c900609525814f8aa8e60b703e411966c34c537cc1e389. 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/JPE872204386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dca8bd7e9827cfe39b4e773fc1887e835ba467d7d9d1a6070b1b965834d1a7. 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/JPE872204394.
キミが生まれたから feat.かもめ児童合唱団
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fb8b8fff15761c6c48684a9bbca6de0d3a53eee4a61c3844ffe83ace556ced. 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/JPE872204389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae523e1c5ff679e89af161222c47641b42d5ef43a16040bde6c84d83f17f6726. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/JPVP01200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23d38c7efdc95af38a33c9cd7ecc3a984ca8037806fe2bef28f131368dbda47. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/JPVP01200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54450ec96faf97e578725a6c2d957b7621cd4c917703b34e5cf850dc80c59bf. 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/JPPC09800951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f27640bb1079319c1eb998a4512b0ea71f8e7b5b9c30eb4311c079bd83a308d. 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/JPPC09610750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611389e27f8d9f179f0508be3a6ab5118dc9c9a321c35eb4e3507475d9743086. 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/JPCO00223830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2bc1e9160dc051be88c33be5103f22a4ef2d7267c033f8f6a138f9e466bf0e3. 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/JPCO00132130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6db57ee6d4d2b40e5017e1825252db2266a023e45308cfc670b49ec49fd857f. 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/JPCO00120700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d5abe69578393440810e0e919a80703f1ad2bac4c13f6ccaeb30c9517e50fc. 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/JPCO00052030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f9997793a57c7c7f5e84b247772b82f1284860a54e13191c208d68417cf231. 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/JPPC09716302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f27640bb1079319c1eb998a4512b0ea71f8e7b5b9c30eb4311c079bd83a308d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPPC09610750.