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 0xa209e461f788f78d9a60a04e2d0ebc6a48cfba96b82600bd7d90815a5b812b55. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a6a3f8d-ad5e-430c-92ab-fc4119e3dff6.json and https://artists.proofprofile.net/proofs/artist/6a6a3f8d-ad5e-430c-92ab-fc4119e3dff6.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 0x0282c05c393d63d4ef0948ffa668255ee81d1a6738adf8a0ff9e547de2f909b2. 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/TCJPQ2285726.
Tsubolu (feat. Mai Ohtani & Ko-hei Miyata)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4933ed7efa2d487e46ef6c8d932c1008a870a97e26efeff3d0059e0f564a6ee. 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/JPX972101015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189ae0397701a3aae9b1fe3ff6194d25844f3dfd452e82045954a5f5cee74c4e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/JPX972101023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfe100432b01bee04e341f6cc250e7d89053649928643d9b60217348ad301d0. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:34:32Z), 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/JPX972101019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a82235ff2343d9fd4a3eb78f9a6455046ae44e14a45357f355abf0a920a239f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:51:50Z), 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/JPX972101006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab81d4850ecd6fc2728b1c7235ca6bca60ec6e3e848fd32b326bfa71ba56702. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/JPX972101008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd544c5a1d13c649db510a21f8de3ba44d79c33fc4cbebf9f6a7ae60961c8b099. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/JPX972101011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ea9416b969f2a4de6766a2fde93369f3ef3124dec510ab466c8cf6f6a99f9d. 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/JPX972101013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed4e38aa58beb5682f0d75a3d4cc527f797ad582bbfd9e4f493e938519cfb6c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/JPX972101014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ea9416b969f2a4de6766a2fde93369f3ef3124dec510ab466c8cf6f6a99f9d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/JPX972101013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da5b8522172ccd8bfdbbcb218d8dd4a2d85c42379bfc9645a41f905e7e5e9e9. 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/JPX972201004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8a8b98769a98da09188e9c485cb2450caa4d3b94d3083d2694d197f60d94f2. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/JPX972201002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da5b8522172ccd8bfdbbcb218d8dd4a2d85c42379bfc9645a41f905e7e5e9e9. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/JPX972201004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8477464a36e5be36a6955df7b72c5da0024bc5bd6693765b0c472a41edd2f2. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JPX972301000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c559a976e5ad092de13c88232201120740a0596dc1a6afdce281ba1cf54bf6c. 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/JPX972301003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82d81e0236c07d8f3f13c4b10fae2f382072a88db707b59c7faf5071432089f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/JPX972301004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20bb966c7b83cdc923141e0dd154cbc5ae3ef8fab73579904e40e4fdd5fce66. 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/JPX972301006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fcb06bcff7f7e0bd51acc8bd99f9113d882fe3d1e355c7bc43f1b982f4e2a7f. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/JPX972401001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5a3520b3b023bf8ee3e96dfe97ac71535e2e29b4089b3db41d66c813c326c5. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/JPX972401004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61efbc95b5e977c2d09fbb30a69920a0e479bb16d848c9f124efe7136b04e836. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JPX972401005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9a2cce4015d3347c95a6091ae99b2a1da136b1b316fbf603439fa6e8ab3760. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:34:43Z), 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/JPX972401007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa22188032b13bac7bb9dd545e3e306e666d8fd137b33ceea2bf6cb54efb8c3. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/JPX972401011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc3dc6fdd57654eb3b441b5da0eb79ee11fd135ab0a7209235fe65b839ed21d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:04:24Z), 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/JPX972401013.