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 0xf4e76ff91108a52c11a00e39f70d4ec7749c334958c8fdfd24bea0341df71379. 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/71424925-ba6c-4676-9514-7df197bb0597.json and https://artists.proofprofile.net/proofs/artist/71424925-ba6c-4676-9514-7df197bb0597.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 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 0xa12d3de76fb03596ca6931deb3beccff3ff9f12f15a3f53dde4b9c5219d7a447. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T03:22:39Z), 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/USHM20824030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f140201a5245df18366a1782bb505d2149cdf608ba35d8e344f73bc84d534d. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USHM20824031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f20baf22184cf1cc7c982be8f5448e75525a8a48726d43960a8317499a10e3. 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/USHM20824033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081a6853cc48d4c50406ea90420e0caa1e2cb6e72cc12816fe9e8d49a4abd27f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USHM20824034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2075c03c9b4ffd9fae9155280efab6e132b03d23a8a2c36def2ae395046e63. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:44:36Z), 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/USHM20824035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb1cdb259546a33b556fdd02b8228e458f00a0aa53fc1ef2d0f9d93cab2fae5. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:01:28Z), 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/USHM20824039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17682e4110d3b42a7b9956e5bf4e2d528c73d2f332ec94ad251130c7d046d254. 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/USCGH0848668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30011cf2bdfbffa1b4f538cde69c9b8e14553dd4abf6e021e7f87e93a34ba3c8. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/USCGH0848670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e0083ba7cc90c3780d5fd9d17413490d63c36b4bad7daf5fbf59f49cd886e1. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/USCGH0848671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd32e5c35951d809eaaa40db835cbb4c8bfdffa88441272f31c6477aa81a835. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/USCGH0848672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a2445ec1805ef8316615ccd8f2ec309603ed905a4cea8087004caaa4ada7ba. 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/USCGH0848673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6a4d957000eccce2e3e34d1303f7df0929f480bf7868de66e0d127e48013cb. 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/USCGH0848677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9b7927cbc8f714d3096b2228d87a2c66cd6e4ba8efbef6b1e198197d59e333. 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/USCGH0897479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da5537683cca7f5d86afedc1b850a69650d99d2afd6ee39eab65763fc60403b. 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/USCGH0897480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb2af68015e7d79ebfd2135d50436543c82b2e2d2076c63eebd8b7814bb9dc4. 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/USCGH0897481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f184fae62bc561bdf5b69afd33d4ea78e998c8b34e628832c9b58229f8ae32e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USCGH0897482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5464a1ab1c4abe5fe7d81783b3c3c4cdc169e47d8fd2d81b82d562de76ddb829. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USCGH0897483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97035e4667880324ee72d5b2c9bc384c7937467389a9febebaa9031b0c32a29. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USCGH0897484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5761c1c5264569a7e6a38b677ad7b91fefaafb849a84d7cb600e58cc5765d82c. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:02:49Z), 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/USCGH0897486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62578d54822a78fd58c977b0002343aed803f45eee7864700b6c1e656bd61fc3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USCGH0854843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84fb6e560d6b19592d82a01db045555f0703f062f7925cde2c82e4c91c0f173. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USCGH0854845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a036e1277706f5ed814bc3e8701d53288b5c100ecd85a51d62b9043b20d14dd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USCGH0854846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e97a4f1a65f0754bbb27cfe27e23fbb3cb328fec02c914e7ead8964f29d7cf8. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USCGH0854847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8defa5888c1fea66bf9f41186c6a2219e755321854b2a5ac4d8c4acf87391f81. 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/USCGH0854849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0190f543e13a84dcb114858df72308b9f44b344e2e0e312315f2f7ba9c3ac4. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USCGH0854850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9346b05bf8d6326e4e9c402c8fd930aaaed526dec514db6d461cc85d569477df. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/USHM91068709.