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 0xbe77a47ed9bcaa20c51dbfdb51d3e0fefe3559bce5a7c26f9f25f55c0c43a7cc. 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/0a4492dc-637d-48f4-af5e-971ecbf27152.json and https://artists.proofprofile.net/proofs/artist/0a4492dc-637d-48f4-af5e-971ecbf27152.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 0xd56480fda573cc393cbc73e5a2e3eb6ebbe4fd879cb0ece24f4b4f7e802086c5. 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/TWY312411003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56480fda573cc393cbc73e5a2e3eb6ebbe4fd879cb0ece24f4b4f7e802086c5. 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/TWY312411003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d06980d464ce3b1058ea1cee0c6bc6502c2cca055edf8c0e59a33fb2e580478. 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/TWY312411004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8a1767883d5e4f46ee5320222c35239bb6c040d301db59ead87666bdd56696. 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/TWY312411006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a5fff938b81c75716ec069ad5dde9b19de2e55ae205ae0c5a1603c90345683. 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/TWY312411007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809e3396104c8f5b9b4c04ade99616cf0d905133648e613716b0c32414cba1b3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWY312411008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a53069ae4bc248419ddf3e6563f641a8da5ef6fbc1dc9c6c4e2914e2fdba10. 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/TWY312411010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554aaa41531cf291ca2a36929ee399e0c6d3d4a4e5efee9fd548490351b72fc1. 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/TWY312411011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55128c508d30574ff6c83f6be34953f8bcf83483ea9623a0378eebcf0ae6a89d. 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/HKG732272566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f86428837f210f723cbcbec97c97515fe6c2df69d18d99bd549f7e36135be6. 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/HKG732029232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1876be7753ca5c07fa3ad07c397b5299852e7751fd324c6ced23a5b91393a0eb. 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/HKG732272565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7323b6c1ee3daabdd2db4a65a74f7103fe22dab7115705ffca5bf1b2995536aa. 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/CN2DY2500604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae6b3dc14512135f5438827eedcf577067c1af11b0fa63dac7b47041c224820. 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/HKG732029617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0a18c7f97b0ec9d7b168e442cc5cca64827fa95ff8852d30fc6fefff98f44f. 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/FR2X42366051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52fbb7ecf477d281ffb0bcc2a17657dc4e085fa3d86fbfa1567ba6f90fc036f. 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/FR2X42366052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8155c8ae74705956ec0d24341bef75d7258d7524ebe2e969dfe58b1527a081fd. 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/FR2X42366054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bbc52a35d0ad58539cb90d93a6243062ee7807f3140c2525d42b275a7d81b0. 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/FR2X42366056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ce057e4464fba4c4ebbe7069f6f9dfb07d27d07fd4e96ff75851800e01540e. 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/FR2X42366055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ee7ecb27af20e7af9ffba3eac45e97c5a186785d6b09e92329f70a4ba2ee63. 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/FR2X42366057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f50a8e39a077d660e48a954d101a54b173f5fbf8ce7ad69e23bd1a33f1e6bcd. 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/HKG732272567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca22c176383eeb27b92f06afcae955dfe7bd2d54f7cad896528fea97f186872d. 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/CNZ682500055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf185179ad5e5d1c1a0f9e47f4a4a0d6ce383f824a3de82be79595440e577c111. 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/CNZ682500053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048ae493b3a467078c2de79bc8830f60935cee7e2aa72e85642ae17b18e2825e. 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/CNZ682500051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88233f5c2014bc66b0e332478d6fcadd52222cec722fb7eaca69baf984d0d88. 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/CNZ682500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f1e56fc65de0925c80aca323c307fdb649dba880847f4406f0b1a221166ced. 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/CNZ682500057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ce056e3b6a83303b97f80a2d28726f5f5b7303157c4de3bf5b505b951f9cbc. 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/CNZ682500056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf185179ad5e5d1c1a0f9e47f4a4a0d6ce383f824a3de82be79595440e577c111. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/CNZ682500053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986b324bad007f4e58c8ed63395830ea956d5f5ee743fcc7a9daf5ed8d96c4b3. 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/CNC072100958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e9b434efd2ab10437a5444ae5724a14de12e94784c3cf78b9e249a2f88b362. 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/CNZ682100147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11506d63e50da09a4cf2f283872b8dedbabfa255d5f4ac66318c4abe1ffe590. 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/CNZ682000236.