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 0xac9404a53faddaac6e9cff3736675df14c76af1034007b1501c42cee5d254f03. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89dda440-72d8-44fd-8f3f-c63458dbb307.json and https://artists.proofprofile.net/proofs/artist/89dda440-72d8-44fd-8f3f-c63458dbb307.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 0x06f82674b3a2d4a0d24ec7cca353a35b135b72b866e1296652fcaefcb5d6ab5e. 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/USA8Y1110033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313f30ac5360b4c842a0b2ed7389a286b8d5fae419cadbe406dfa42fed1fb10a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA8Y1110035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4391a3484652632d72e01049bbb5cc5d4a4128073404d3953e9cdf887521377b. 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/USA8Y1110037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4739464671cdc09efa15f3e0ec933c50713906c9320fa7cd058818fc0d5f30d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USA8Y1110040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf559f3197a54b5ca0552b18b26a6b6246d1b4c49f39a0c8f089a44c3e9802fa6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA8Y1010177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72220acd3e7f7c52c84d13aeb3199f60308ee738601977960ae8de4cdadac3b2. 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/USA8Y1010178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f1ff2ebb663270432a50b6521ead84740e628b321b1faff9ba9060e77943fe. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USA8Y1010175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2c4c5f83e82c8b229bbe8aadcd4ca90097ef5b774d1965cf70e331d7dfc5b9. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USA8Y1010184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2290315a0e9e5cf1a9fbd2d909b850f8deef24478d26dcc930fd6eebd1fea99c. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/USA8Y1010183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cab8bc34ad97f474c2b7a0af23d546b1b4bb4e62d227e616237afcf2dac277. 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/USA8Y1010174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71306e623dbf82b70aeae3c4aa1e88daf6930c9d4d13da1edaa63891f191af89. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USA8Y1010180.
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
Tribute to Jun 3: Modal Eternal (Nujabes Tribute)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440b68f411f6854aa6d648cfe393c34329660dd4f0f9d6e1d2aa1cbe0cea1fdc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMFME1305953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf999d39163b70fde9f5f252fcdaa865f477825cba5d0ac72c9ce796062d4ab9f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMFME1305956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0cfb8c95ed3b170cb2c0ca1bf31cb29abd4f0e78f19c617fb7b2070bf3e03a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMFME1305962.
Tribute to Jun 3: Modal Eternal (Glow in Peace)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53435c12b0de62abace30402a6b60c71391e047dc664e585086d3bc31b964543. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA8Y1110022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f3b911ffbad31e717ff78a3c2d6e008e247a9a125b899a44be60dc57706299. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA8Y1110023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc06615f9fb00563258efac2749e4c6a88a032f7d56ec9fe05deb180fd0a185. 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/USA8Y1110024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b19ac4c05a8bb88054ddae3fc908ef606eb1fa3415a5bf221860115fdc46956. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USA8Y1110025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8368f8f7cca8d8dfbada855262ed0152eb24fb2499e13f55f800e8e106c2fc2a. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USA8Y1110027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f356d79c8409f53ed89ceb69a4d1b95643b109372e7ee718564d6d2f89b51b9. 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/USA8Y1110029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48c59891f8a8737bf7e7b62e1794ccd79c2ccc35ffaa03f3ba4a97fcf6730fe. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:52:42Z), 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/USA8Y1110030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1919f3e18f75d0bd5d1d184c838546ed4e2871910c928120b4af707325ef4eb0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA8Y1110031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd37365fccc56910e5acd0a517a1ee5f59483216091091a0975d22ccdeae973f. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USA8Y1110021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f636b73fdefad2d65ee0741fcdf6aa944bf7d6618ec665725b89470380b5dfb. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USA8Y1110026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0d0d9ca822eb07089171945fecfe4787d4fcb8fb64f7b26075644b374b0de1. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USA8Y1110028.