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 0x11073d80125efd7b382e6cd3759d6957ebae3eb15bf88c4822b8e628a3efde6f. 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/cf658085-14dd-4184-9705-faa65595d952.json and https://artists.proofprofile.net/proofs/artist/cf658085-14dd-4184-9705-faa65595d952.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 0xc906702401ffad28d1f616ab935260f1a4be4bfdf5cf2d281c9a0c30b1573753. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QMFMF1328744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4721bf401dd08334807f15f817b8fd413926515ddc88566d40d1284fee37e43c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QMFMF1328723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c557086685410e62c659e2987c862297fcf795ba9b89b98951a0a0c89a1b231. Chain 2 (Bitcoin): anchored in block 957868 (2026-07-13T14:56:55Z), 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/QMFMF1328725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb95b21030ba9a6736073ac55c42d6deeec99416cf488785c9dfd92a449922e. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QMFMF1328729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1830c58991dc76322cac9c057f030456df639f81a6f1f924994b8bef5b25dc18. 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/QMFMF1328763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6308b6f369e1bc93e301ab00b05c095e8dda09c2425ce237c69db9c59bd32c5. 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/QMFMF1328764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364a0377f1d1a7227d6bf0ed7a0bac75915c17b856b73c8748fcba5ae1735ab6. 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/QMFMF1328765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c382d12f81cf4e60d72135f6db8dcaed290d0fea8825d103b2bf1475110b4c3. 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/QMFMF1328768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666239933fce83d8ca595f33f1222527d3117e3e5ceb35bbeefe266b97536620. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QMFMF1328817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538baf027fb552013d2f13a74a723a29bb19bc4acb36cbdcc15761b682b13b03. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX281727981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fcf680f6aac4052b06db891c21d55cab44690b84571ccadb115a381cab219b2. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:03:40Z), 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/FRX281727983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28eededf32e88279ea6f69f13bedec9c068660de2fad2991ade31fab2e33246. 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/RUUM72000901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea883a737143b7ab3fe9907cf3c5d2d29275699f0d56647484e0a2c4fb43563. 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/RUA1D2582857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4130ec800dbe6934a1deb266854a2ece8ef1e0c1f29d6606646c4f0c4156e3ac. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/RUA1D2582858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85aa166c05ba716fd716fc033824e6641eaa53b42e4a1c91ed0cb17a611724ea. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/RUA1D2582860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd987157430ec2a80968da0b61de1ca03f70dbd0571f4cfdfe82a932787a54c1. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:38:22Z), 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/RUA1D2582862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3967b39c537101abbb31c4c62511ec23b1e785a22b625258ba941280f34499. 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/RUA1D2582867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b5f054b09082319fd48c05f4a5307d07ab155811cb9ea70d62cec43e9cddac. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/RUA1D2582873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6d277f464a2540ac9b1e03e2ffe99acedca0a07835330e9abc016ac1a5a343. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/RUUM71901014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8225e34de06157d84d2efc5fffe6d9e41da722740e798f8c0f4978f58b60c238. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/RUA1D1708207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7261b70862cb32c732a165deebf90690061f3d240f94d08ce624b57a3cf8a3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM6MZ2368367.
Би-2 & Prague Metropolitan Symphonic Orchestra Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578c6dad0028568066d7cfa3354a8431c05b52afbb1debc259aefd83b95bcd46. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QM4TW1798302.
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 0xeb080de5da406d310463be329159c5a358ef9876983b1d4c592f1bee1f8e53d5. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/RUAH62417377.