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 0x49380f2520ce6d7af5b15d414519de248c003d617b1ec535447aed9648b11626. 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/ecd0a255-f526-47e7-811e-4b4f1b4a1f90.json and https://artists.proofprofile.net/proofs/artist/ecd0a255-f526-47e7-811e-4b4f1b4a1f90.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 0x97d910d8cf3cb7020794b52552806e58fc9929afcb14b32ce8a5bccdd3441b1d. 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/QZWFN2334388.
Seika Jogakuin Kounin Sao Ojisan (Ending)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17f1179809045fb73b18a9238a509d5a15cc5f3b06a2d5dcd0631e79ed07c75. 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/QZZ782438702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1567641cda766e62245dd6e8217d1d772cf08375b2cc21f566c67838266b540c. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZZ782435202.
Suki de Suki de Daisuki na Classmate no Ano Musume (Ending)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01db73876983ad41a334f926c97f891775e86f7aa7d3a4a981693d8343c68f6. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZZ7M2411990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b89310cbd19d481a7b6285a702d5e11b37dcbcd7e6f028cec9f35ca274d6f26. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZZ7R2456300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e57ab84fdaa907538005066488702d7e12dab605e94260c6bdabe3a86be5aad. 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/QZZ7R2458743.
Shounen ga Otona ni Natta Natsu (Ending)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd188415aaea9b920efe3986ac277a938ecace740c2e74aa94f3f641d6f536b. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZZ7W2453322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8264f11fa432d2644a73826bfd74893f409ff7defc7f3498fc81915d4f3b0029. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZ7W2453317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa907e5aa524b740102bb82317df2362c41876f654ea6be5a883d566a98308d31. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:49:05Z), 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/QT3EX2459665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73d0513aad70684cebb75bc9d361127b65e91e16fd0e80d544fb4a71464bdf3. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QT3EX2459950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93b13d16b6646eb68d8a0706539b9e7db9bf2137529d59d16c558d75a2b8c26. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QT3EX2461822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec335cd198391fdd4b954b236678e930df37c0a84faa4253e4e373f0a3246b1. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZFYZ2574732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bf1357fec8c66f331105376b8aee1b22e375e3c4729c4db36154a445abee61. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:28:01Z), 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/QZFZ62573573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a616c3b69038fd26a8a49179f75bdbb25b1c47e317c3db23d2bbfaabd35ab6b. 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/QZFZ62575457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc565b9774cc88ef6b96330d0b177c3a6a84731013f6d2f96426f2bad1ff682e5. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFZ72546361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645e088ae23604a066bfeaf2996840b7a94fe92f7d6f54b11c5ecb266bd56f70. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZDA42589788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b46528b9c9129047c37fe3c05821bce79e15062aec1b7dc689e4a311ef35a64. 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/QZDA42591303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36600e0cbc2fa552f1db25717750629d7f4ab04ea84969b675085a4152b9e241. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZDA72557666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe8da4c286e718aeba38e68fd87595ee1de9340761a5748d6a8c99945f32b1a. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZDA72557665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb06200cdc0a92891c140e348ba5adc48efd19caac75d8bf7dc301eee9ca34a. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZES82554315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d72b1012cea7988466ea4646ee8ea044a36316d71c20c69c214c00b8306b516. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZES82555898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe80937ed86e47f962db674be070c25443bbdb2d04d78ec3314e2e051438a86. 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/QZES82555902.
Kimekoi! Takane no Hana to Osananajimi (Ending)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd680779585fd4e1804db69d51a95fcefcd3c8e87235e9a790b1b87976ba983. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZHN32527076.
Paizuri Cheerleader vs Sakunyuu Ouendan (Ending)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc857c3cd0531ae1e6e3a60b2ec6c90306a72a50c6daa09d5aaf49cb93f608bbd. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZHN72519991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca701697cb61b2fb17cd1df37da794ac7fffceb20242267e3367d9488e334e9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:45:17Z), 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/QZHN72522088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263d797c0a235a096aa6d2f5b77000eb374d56cbf95c748a9fdedfcd668ae005. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:11:04Z), 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/QZHNA2556572.
Nonohara Yuzuka no Himitsu no Haishin (Ending)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd294d09aaf81d384e068e1eb6498be3dc10702ce1e539cf6985faf2ee955843b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:25:06Z), 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/QZHNA2558034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d2495a127ed23e226e8c6f511f10da60404ab7f6ffd92092ea076b81cce487. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZHNB2559632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee0973dfabed646442bab2ad4f5428f6e9bea2d7b6e41a4a662fb65914c4fb5. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZHNB2561011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ff1b6b62a92d21af21b69c1304fa10cf5ad85abb819d3dd2ebc46fcd7396ac. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:54:49Z), 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/QZK6K2528901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f45d078066adceb57a4fa7b9d433e700471b145686079face502cf0278ec57. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6J2536106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1733a36f4d6514eb424a769c8e9a7a5971ea91785cf85cde21c4c423291b64a. 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/QZK6H2587873.