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 0x4a560c56446a13247a130f201cc9dc346a541962044f001efb94209b0cc26fb1. 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/31dd3962-0644-4e0e-9a1d-8d6f809ffaca.json and https://artists.proofprofile.net/proofs/artist/31dd3962-0644-4e0e-9a1d-8d6f809ffaca.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 0xd2f7ae105b77225f63c8e1fd110175fd1602592602125fac942d2e853ddcf397. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCJPQ2122113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2931a93afbb55f7908276f147bbb26f6deb2967b010d4e922a8eaf3d53d403. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPQ2122114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b8a52110ce538432afd3e4960b71d9075e53ae220f9eed4f583d265dccb840. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/TCJPQ2122122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fcb37b4d45f598f9ba198b5bff929328004443d9134ac72078be84f5fe68265. 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/TCJPQ2122254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0741f0c686fd393a992ffd58352482d9e321ac2819acf1856e658d4dea1dc6e2. 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/TCJPR2286482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f15ddbc88c727adfad42f4c5cf4fc9a0e6310076d9b9d93275705a134eeac5. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/JPS809914599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa559299d6bc25f4362fdbc597f22fe2fbb807d6447bb89e4dcaec071fb3b1f7. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/JPS809914602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5781473ffea96087c112bd60945a720eb541043e9a8f6e16cd9de2e9f6971b. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/JPS809914603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db67e7e8ac6c59d23b13d87074b08275dd95df22ca8086fe74e956eda4f9a5f. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/JPS809914607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d359967b999562061bdb3cca162ed10467abd2cfcf5afa40ee1125ccdd2ac09. 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/JPS809914608.
そして銀河の果てまで行けそうかい?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6c5ee1f60e828ba5d8ca71231e474f99688417fd2251af88bb10a0829d688c. 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/JPS809914609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e4b8c67fcef450ee61c2d311ea2c3dd4a431b93733f935cf259fc47edda93f. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/TCJPR2286671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e01e205dff92da89466cb6032be45430b00cf51952da4e02d8d14f709d4d3a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPR2286682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f21e212b6a268c4b3adde0f4ddbeed2b3af85d26fdf7a5d750c7dd32e365db0. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/TCJPR2286710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf512e826ef8f48d0fecaadea9441c828dbb1b33a7d10add3a9783c85034444d. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/TCJPQ2161781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc980a0e4145d2453d7a24e5718058dd553b337f6fd0820a6eff984cd152fb1d8. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/TCJPQ2161783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ae75e63755d2bf94d4ec8cf9b877607358b28e1e36ba4b97846977762c1d4e. 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/TCJPQ2162315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd2ebd9cae7b507726fa1bad3186a1c9457cdcaec62202df5ef5021d4e4ff2b. 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/TCJPQ2162340.
今宵も全ての酒場に愛を向け歌う
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87eeae05bbf673c21682a815d5b36fc2810df509e575130f36c966c9b0c44159. 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/TCJPQ2162347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebae8efeb0de99541490cb7c2885b7bc2188d97faa91ad601ac3ea0db2b60662. 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/TCJPB2444299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f5ae2fc11d9aea611fd221302c81a987172bee6c94d73beafb37041331ee2c. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCJPB2444309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ae96be3def429b22d898435552a8a438703853c85b255c4d1bd1844874f8c4. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/TCJPB2444598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a324bf1cbeeaa491f297aaa8ce3a15cc3a616ffdb845d7c52e77245ed396371. 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/TCJPB2444603.