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 0xea03ce8c0027a071a76f5ca9eb302c484ef7af4c9701e09d0655146dc750c8aa. Chain 2 (Bitcoin): anchored in block 953871 (2026-06-16T01:46:03Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0733338d-d8a9-48fe-8e48-abb94200b307.json and https://artists.proofprofile.net/proofs/artist/0733338d-d8a9-48fe-8e48-abb94200b307.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 0x0bdcb37707d1e3130a04a82e370d28fc506f50462fe6eb5888c5770a7d0013c5. 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/JPVI00713160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777c1ba643135afcde397b023fa58736699bcfc4705a801b14942ac1622bccd9. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/JPVI00718500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bdf7e62284761084f88f259333ae4daea466029cfc1558babfd0aff7c143583. 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/JPVI00656910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fef9cdc3edca6913c072a0eaf4691c4d18fcb41acc672e09f3cb2bf16129ff. 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/JPVI00606180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c19fa35047cbd31e60b4ef2f59f52172d30644d086c100ba94e5092da41dbc. 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/JPVI00718530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600d42c89a02303a9ae48b839f2db73531db124af32744fdbae36e19815918b2. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/JPVI00644310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ceb94d64b310fab173c901845f97829ee606e629fd4ba942b6fe64eb909944. 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/JPVI00705810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2816e7e83dd2a2ddfa62ca05331c7a95ca0de37108c3f4138d0522315556cee9. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/JPVI00718550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a39763a7976606f18d12c56c2d2ff8069a30c32bf46291b741b902b0742725b. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/JPVI00718570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cb1bb3ff060ddd5fe2fd031074e8c3c06fc0835272078c0df02afdb20163f7. 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/JPU801900059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ecdfda3ab7b214c10e9c3fe236cfc3bf04db0ef63f1313ce585f5d7669bb79. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPU801900070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf272bfdeebea4a1de540f433782a828a3ba8cb7d8b6906470d1755373bc3b869. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/JPU801900062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6387e24c921e8b526f967eeb6089aee21892e321cd16f9ec205dd730131085. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/JPU801900073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1038bfd7a7180b623a20d6521365b4d8a7179bb04052e0034e0455fe8a7a45. 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/JPU801900064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35f2f72e7111484e1efd14e0e303fbb29c0a94ce62fd024f791b51208b9c86b. 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/JPU801900074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef68645c0b0601bf4053bf21b78dc75872e871ce6020cdf32e943d5e85af090d. 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/JPU801900079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe476aad09905c3fb948db82d12ae531bba198df60fcbd7fe19ec8a2fba37536f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/JPTE02306440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b8c74c6e2d167e7cdf497f6ed5113f68a0785fe10ab329dbf1b77b033aa338. 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/JPTE02306500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5dba9fc75b9558b0c0cd21ecd8eb1aeac50038bc7f89e61a4b60ca35a45bf81. 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/JPTE02306510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bf9f27ca6e6dc28e9eeed7e81b75228c5d6a176412647cd02b7fdf0d97d00b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPTE01802500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939116286dcd1ce04b50b2ab21d0e150d695c764c66a6abbc20879f2dc8760c8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPTE01603760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3730be3c994ae89f34da9d4519cffa78e2f2922ef8c5d14db4d90d0ba5d951f5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCJPK1906664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc73072ab210af4f4968e3299ea5135c4c81a4317917af2d2b9e908d4609b7a7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPZ922103181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661d29f30e95e1ec919c29cbd8ca3ea1b35706d9001a3aa26433f0c19766f6c4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPZ922103182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbca1618bb85babc5a659b9b12594c8e2b72e7e367d383a8ca68b1a99c390645. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPZ922103183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef56f334fddb68bfb844e9f760dbcda728c51db24f45a4836700070ba661952. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPZ922103184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa857721a0089dc8c4c6f47b26314ae175fbe02c7ab0be47a96fdc3a4b19730d6. 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/JPZ922103185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f24826eb91fecf347008cd163283b0e351e111cc4a492176a6e54be4333b6ff. 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/JPZ922103186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55c148fc93f70334bf97b825eaffcd37267067c41c2b7eefabf4d89be126097. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/JPK402101056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a722ca890770302c46f46e34337a58d40cca2ee66cfdd01a8a511aaeec68eb. 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/JPZ922103187.
タケヤマカルメラ (カンニング竹山 × Calmera)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b8a8dba402633a5211c4ffaf5071f8a188119732f261822cdf43e754eafd4c. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/JPWP02100323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe215a5fe0f1c886ccf4e6c886848101e2a2647ed11ad933fcf5c050441ed4c27. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/JPZ922103188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0996aeaaa3ee8ffce8db1ff50d65451d5a4e6152de4c1714a8185a01d0c53e23. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/JPZ922103189.
Don’t Stop the Melody - 誰そ彼レゾナンス Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c27889f49d11ccc00922977b05c614638ea9ed58dbfe6f9aad07d016d1a874. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCJPL2009253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b552297435545890cc70c29613ac2f7513f38384e0e0edc6bdcb6190578f1a8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPZ922103190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746a7a77b35d7ec5ed5a0f710c89ff54202f8d78698777d84c46b5f67e94c59a. 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/JPZ922103191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c57ea2099da92a941d0a249986da33166e96c6e30a44bcefadff144184c946c. 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/JPVI00708660.