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 0x73913f426b3059420788ffc6d7393345408319021ef1078565f9b7c352511479. 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/fa302735-430f-4912-a275-3db665a607f2.json and https://artists.proofprofile.net/proofs/artist/fa302735-430f-4912-a275-3db665a607f2.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 0xe76b388bca6f8a8581c52ff82d9474902d7abfba198b4da25e7c803ef4580bb9. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCJPL2065943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fe0b585933d121ed1b827b7c33f7503be5965e4533d92c018943bdb352d4d3. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCJPL2065950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747b804dd53f3acce371c1839686566b8a2fbf0eb20117f18ea15beaf49faebc. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCJPL2065953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55db277b13f93bf5d4d990bb6f7994e4670e2fa11f53fde90bd394929c77a047. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCJPR2210869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd568809ce99004a7538df9a7c636b466e227dc06b5c4aa47c3b38acd5252dd69. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/TCJPR2210871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ef1639ee2dbb6e933abd65f8b9676f773174127329b1ebf3d5095932bf1f47. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCJPR2210872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08519e5698d9f7713cdf157117d7ba535fff11e10599aafe95ec276848241f29. 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/TCJPR2210874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e421d5376324301f085d30ea61bf3346861003cd7ead15df9578a10975a6b98. 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/TCJPR2210876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9164d8c430a9d26eae244e6bcfc7b8d79d320bdf3edaedbc0477d9d5b529a4. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCJPR2210877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f53f813de044757f8bc666e8b95ad8e3b1b8788fabc7df1214f02de0c6e7c71. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/TCJPR2210880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27bb3bb36ef112068c6be701547198bf3b5b19f06e5679be6e71a9ded2b889d. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/TCJPR2210882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5379d366f94c1f7dbb034f613c3d5e16729f878d2c5e935973c9f607ae5af0. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/TCJPS2245193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47d7883ec6fe03e15ea645118c51967b8551b4b90f1d5d89a04ba1719897321. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TCJPS2245194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb015627dc12cc154d6996f64d70bb0ad19dbaf8cb1c53d011abeceb056a270a9. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCJPS2245200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744a55203f1157b449d9f054c92366b19bfebc1cfa803ce00da57c35cf26d00f. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/TCJPU2358576.
ぐちゃぐちゃ 蟠の章 サウンドトラック
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3440f09f24b7cdc972637b2df7494e3b51892f0d517b80e8e31183afc4089b2. 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/TCJPC2419183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ee8d9252f376b0da8fac9809af66de270616d2903cb2e68c6793d09a56101a. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/TCJPC2419210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88eb8d640f56b925628d91e58d9269e36b10bbf18879cc5936d3f9904b3bd82a. 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/TCJPC2419197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e210955696b85cceab9cb51a3b108c2534c619f8477739c6c78a349a021bdc4. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/TCJPD2544138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d0e573b2111ee6dece341d9aff49d1963fb6c100a5c07b930e2de7742484ae. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/TCJPF2522033.
ぐちゃぐちゃ蟠の章サウンドトラック改
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2640bfca0f9d3eb5ee7d91a781513209edeba953b38dcecfa70d2e04692167. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QT66J2507756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed26886d44440d38429bb21d1978b256dff81d7aef86e03a124aeca7fb2ff2d. 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/QT66J2507759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023e6b8dbbcb0a8275b1dab36019e3fbaa6f3c2df15a357e89252b594f9860ad. 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/QT66J2507763.