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 0x7e1a03dd84c18be0bd12bdf505fceae54f5a67c90cf56066d6bdb158efd99160. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5773fae3-1d33-42a6-ab08-5a1fe1dab1c3.json and https://artists.proofprofile.net/proofs/artist/5773fae3-1d33-42a6-ab08-5a1fe1dab1c3.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 0x060168e54615ed36a505cf178f72925f5a9bcd1e1b365af95f0be22897d97e3b. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/USHM92140868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4c04266c1c16d5e59803cd536c9c318ebefa659551b33471cc28d3511d2b90. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USHM92140869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e35709baba39e673ff34afb46b76f0bd8925770c8ea3d2315483a506427b67. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/USHM92140872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039f711440167cfa12e1475838a4438a9d7aa5b90c148760932c771064486f71. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM92140875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f28fd35740dbf0b017111fe6311082200745385feeee1e4c3c1d85a781522f. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USHM92144641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e42e0bef2eb1a27c4b8a22e4cc8484f296fbc7c04473ef63d0cd2807e8d061. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USHM92144645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa288c8082fc706e2296d6c5472ce426e2fc8d530475926e513d9a895ce666d70. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:54:16Z), 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/USHM92144646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e6a960e02ffe5fe4c739734d9b669029f05d9b39d5b6a73749c0706025b1db. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USHM92170386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9312955cb3947327ebb96207cbd24278c239cd5e9d259b3c527d643c8db16caf. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USHM92170387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3d1a83a86f8caa7edde9ea97180d4fcab036d5fdcbe06c5e881f1feb7a9171. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USHM92170388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbdf1a917162f82a23847649ff178fd2480af44e754f2700943ef3744ce577bc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM92170389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551b6fdfc859a4d553ab1e3d087ce5572dc47e7a03417ac4efbc73dbb68baffa. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USHM92170390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4aa7cb58cd0d8cdb086dee7c17e94733faed43e8880cb61534f9b96188d8056. 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/USHM92170391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a048f25018f90fb990902a821fe31800e252983f738b2109812190b681983ad. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/INH512016374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12aa555b64629f09260d9be5731ba01017b94fee266bc0cdaff9156a2fa4d646. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/INH512016373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e1f9eb3e51ccc63e36d61b52b370ca3438ba13936884ae5ae41da0925329ab. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/INH512016371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec8ed8e8236c06a89d8357cb8df4938548190dfae562c2ab1f78817fdef9c59. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:38:14Z), 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/INH512016366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793e989e6db732fe8ceca576bcfd0ba5e9bdd90c925f956c24dcdc17236e0341. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:46:55Z), 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/INH512020978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fcee0708928fadb446610e990119e48bd569ac9d24ba8e25f2844cd56417f55. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/INH512020976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b15eff69b488799a21bc7d9d3fd23a67f8f22bca878ef24f1336262982b5f9b. 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/INH512020975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3f90d941422b16935e1b6c1e9d1a857a63debf529f4d3dbf5dffaa44e26732. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/INH512020970.