thumb|upright=0.7|F Chopper Koga at Japan Expo 2014 thumb|upright=0.7|Hana at Japan Expo 2014 thumb|upright=0.7|Oreo Reona playing a keyboard worn on Arisa's back, with Tomo-zo at Japan Expo 2014 thum
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 0xdf6ecbe220291975c7c92266957d41c2e31570d4335fca899853a4c28e12e464. 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/b2f82c45-aecc-457c-a6b4-0f573b2b1d65.json and https://artists.proofprofile.net/proofs/artist/b2f82c45-aecc-457c-a6b4-0f573b2b1d65.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 0xc6930d91a8cbacd4178bcf1cf410c17a9a292fedf79c13ed3feaed5118b0b4a5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/KRA341774088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc08a9673faa741af1952eda665e8e5a0b42538401d7b4f46e51114f0c77712. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/JPPO01330125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a0f567c1607670de398e1c6ebf0f6f011be390e371b218ea371654a73af83a. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/JPPO01330118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091a3ad64e2d319cfb05cf50c495e0a47bfb15ffb600b8d3427ab743d69a6886. 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/JPPO01403945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93c21a53bfc05f71aae09e3538eb62e22faa811600e27f2cd930a6f32ee124e. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/JPVI01424740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263b91054f136917b4806f3c7f50e848f2a92487e5a69df5c7c837ca0a5cf669. 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/JPPO01403944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42b9a96fd89f79430121a98730983570284ecedfb9a63f3a4fd739ee66a5b01. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/JPVI01514200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61909c6c022147a334a05f804c3067429fbdf042cb53eee1ab116b0d7de786be. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/JPVI01529860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0feeb6ffbb2e704f1e9f3634def73c5725a09b461b083631c6ff2d571ab1320d. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/JPVI01514180.
シャキシャキして!!/アルブスの少女
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9a087518c7b91ef4d71e493d3d95d8a5a5f056ba2e522c26fef293b0249d45. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/JPVI01763270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f037021463e8ed599c3341e291f82cc17937b7b0d5bf8f4d9151addaf782d3. 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/JPVI01813561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649e86a87efcae43e1be4028cf9820c1db1791fa1f0a0759c241f88be31f78e9. 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/JPVI01610470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a847d49d79b731633ad89db84d1f0267b8327d83812edde995202f6e9a2e46. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/JPVI01725740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd4b4cd12caeb51d5968a8eeee12f3d393ff5d8bf09f70d1476716a44e16721. 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/JPVI02000477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7be43f0193edc7d8549f71e7c206c0a0d03f7ef7e74c1782409070a349cb97. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/JPVI02000485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e4e8f77becc63afcaf64bceec7336849241b655b8a273b69b1a50079bc262d. 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/JPVI02000486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fbf54c9c5098e33a37cddfcfa6e930a686469fcd933e5396f8da2a74e9f203. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/JPVI02000489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061c4d5960b22bf367d0f43d721bf7c558a9a4ea63507c3d2e27ebdcc50d93fd. 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/JPVI02101528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061c4d5960b22bf367d0f43d721bf7c558a9a4ea63507c3d2e27ebdcc50d93fd. 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/JPVI02101528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a222c06a5d62e9cf9d3412202c0d8c59ef3d9de4713e7f75c4f357439ec925d. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/JPVI02101530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8480a41d9f9bcad425532450a74021cb0c6c06a80ede95721e8e11f32b6a2a. 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/JPVI02101532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c1cd7bb7298a91e2124c571364efb91772513edec5b8bdb6212b997bc2bce9. Chain 2 (Bitcoin): anchored in block 957702 (2026-07-12T12:25:41Z), 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/JPCR02302060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe2ccf4091af0bd64d6486bc67c49cc5951fa581542d279b703fb85b602232c. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/JPCR02302480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669f525c16c34b58880e91406c9ebbaee21eb6f28c2f0222635c65d0c2af7321. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/JPCR02302050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee23188ccecf5ea4c0e544df07e744792ec674234b525ad13d87f8563afd79a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/JPCR02302500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c655a9ccda5626608f7697b1172e549ae4d3c20cee70762f09cf9e0e91b673. 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/JPCR02302520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068f763154b691750a72c0a8163e8f5f04ca1d04e9ef0761dafd29248dc2f08d. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/JPCR02302530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de04e1f28a16c5f7a6193f314e85efaa23070f5a0ce8e5852804f7b1b03ea95. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/JPCR02302550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406255cddeff0b982f0c0fd81f66f123b3f7ffe9a2d9795d200da6bce4ee604a. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/JPCR02305200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4055fae54c0b669769a6327870eb6f64b1fe12bcc6cfadb342c164979e65b1. 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/JPCR02400190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834e388ff683d5575c17c808cbb453a324eec943b5c26401f0e117c4e2ca628e. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/JPCR02400200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47489a0e59a90f86d1c162b46f3f0077087e7a7d23b0e8ddd4ceefe038e28f30. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/JPCR02403700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb6e69619bc5678f32b93a238b763b280466a48a7fb5da5e4b569273272b1b0. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/JPCR02403710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2514da11825556ef27175c9115ebcc860f7a4565d5d5fd1f34ae081c9f3ea0. 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/JPCR02403720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ead62a64fec558b4b3786630743ace1c3d8a7bd5c0466610d2360eb4f90903. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/JPCR02403730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b790d559493f6a2d92e242e79b4838d77f80a23f6b082c98b042ad60120d0ac. 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/JPCR02403740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e596714b9723aeb8b330db97c08017d616baa542543d49581e6f1851397316f. 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/JPCR02403750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e12d1c03bcb04ba333aae4bbd8e4d5ec19c197fea58f8f992df5c1ebf9b656f. 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/JPCR02403780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92056ee88307a38890135131b1122f84bfcf9d8ebd3561d582a07ab8f1495c0. 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/JPCR02403800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9242f5e7a46e96db9defa0c8031b48e90ab3e86fbe6ddd012dddc59a2daa7908. 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/JPCR02402820.