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 0x05e870c689dd36aa299b87dd92a51e1ff86452e8b6349c84626a2ce9a447bf00. 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/89439882-4f25-43b6-b982-18ec772f106e.json and https://artists.proofprofile.net/proofs/artist/89439882-4f25-43b6-b982-18ec772f106e.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 0x9065e6c3b39458ff97cd5b95592f7b6e4464780bc416c8c93c1306b9ee60e405. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ARFNK1400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394ec65eab69c39f073fabc0d66a2041791d98e90fecf0567e078ac8c4a9ec0c. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/ARFNK1400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa298e1386f98940c86dcbae3cf77ab0f1d7225246f5076701668698156fab775. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/ARFNK1400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554980bda828d1515c28ebddcb273961ea8cb2f646d9beb336c3b647d49477a8. 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/ARFNK1400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9243da2fc6aafdb4ff32f379b2e4d9e6241223faf1254af18e946662d1aa34ad. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ARFNK1400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a3054c77f7956997318046de948fc2effc88aa0dec03d3cc258222fd953dde. 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/USHM82078352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fad780ff3a851eb6a1aa12ea0a1090de66aaabd3333e5684c0c244519ca92c0. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/USHM82078353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab192c07e0ce46429ab2a872e385b6407a6049d1c941a86ac26266695be2aba. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/USHM82078355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20841914651e0026b826da525a6719ab1e44305fe97e85ea3520f3817d7bad28. 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/USHM82078357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81a39149bbccc63b2865af709765855ba51b102fb415d68cb77270816a43993. 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/USHM82078358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6ae9f59f4f1cd464ef5e4b5f690f657c3c718bdb74b63d8cce271fec0281cd. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:55:43Z), 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/USHM82078360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e466d364a30b3474ce1d922488393dee052b8a7914fb6b21e8d3e77491414f1. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:45:40Z), 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/USHM82078361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37402c90343cd2e274f78c539ae494b04edee63deb2f560e77c9021a8812ea1. 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/USHM82078362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3a58d955bf94126bf1ebbec06c420997e88f3b2fc5f6e370420ea43a297c23. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/USHM82078364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55dc5928bfe8b2f648f740b099d7a77a16eac108eda4a2b8fbbe11ad5c92c4ca. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/USHM82078366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65125b1b6db47742f366909a1638546a61c591e7b7825b1d5fc1e743ca08a76. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QM4DW1610334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5225880124298fbbb7a04fa563faab8fd02e58a46dec53cae3866eb250042072. 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/QM4DW1610335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd474915eab845c636c3215219918a89d1f98308dac9dbf84028aa7bbbd9801ee. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:55:22Z), 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/QM4DW1610339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39639eaf2aefb77d07d0ac12fc96a79b8c11507bb21cea3ccf6c2b2789a5c0db. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QM4DW1610343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b988079181358f698028b07247aac8e2cacbce3f1ba84b4bfa6afc23e2bd90. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QM4DW1610344.