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 0x068655079160c485f0576d2e154ff6369bf254fba3524cb4d74d365aebc41a91. 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/3c9602a3-5c3b-420f-9a8b-638e261650e4.json and https://artists.proofprofile.net/proofs/artist/3c9602a3-5c3b-420f-9a8b-638e261650e4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sefiras Haomer (Acapella) [feat. Yehuda Solomon]
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 0x719a787d1126e8b7a3deed94178ce79d86e848ffbd5b0f38a3ee15959d508373. 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/USDHM1901888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ee6e705c7668fc9e990b0d12dc95d6675fb34a476fe3bf8639791387eebd89. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAFM2105793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7dababdb70220a70614a5c00735d65fadd28312b59cc5f0b7140eb84663cd8a. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/USDHM2004865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60c021717b0538b4da53cc74ba72b0b1273ca321b497918ba27ebfd7aca7058. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAFR2175705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e2dc35a3fa6384683c0aa71f95d463e3c0ce4db0605a4447eaf61a6908c8c4. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZHN92210725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdebdeb3e07d5078386d02850ca0f3e6d07a01a4b953e9a3ae6aed4692516b09. 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/QZWFG2301314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf964225e64055f625f202f4fc29eece680cd7a64ce51a7ad2c38643b66c9934. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDA82352839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f2474eda52a20a8a92e2c008783d5bbe97969ebea4e2806624663033c0b432. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDA82352840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34c497407fe2d23b15954d0d30cefa393bf79f8e771d7b730c9711b22b623c9. 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/QZFZ62325555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc031b1ecfbfc189c0e773ee7cb393c49a3b818557563ffaf65cce5218b85e2c5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDA82352841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0b01b303fa99dd703f971eaa4bfd20a24660710fc11add45759873ea6c121b. 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/QZTB92291403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059b043a8fb5b1b2ef0ca7213395cd7e6dbe2798dd4f1ebf85bc688d42ae04c6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDA82352842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562d7f1ab8e7be33385a75f51be00b5f56e39058921ef55dbca5b9fe7e9c65fe. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDA82352843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a28b3ef6267766d3f0fd3ec51e7e95246c4ece7835f6bda013d38fd4db2ebee. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDA82352844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090925860deec73b74ebbf9484ddc30ac683f5284b577250f136fa1ee119c4d8. 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/QZDA82352845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76932f02cf9b26de87eab783fc080ef52b905ea4d348d9f0814c8ba3eb99910a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZES92290330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf8aaf112fdb5c2af09c7f5f94437724b52dedea501ba4e243fce1389a19e5b. 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/QZDA82352846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a4c622656554aa8201ad74c549b1990f346d889ff1f7d7730778a49fcfbbbf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDA82352847.