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 0x158b27ce9b8a702f4609c0fbacc4576da63b9155f90c0b9550ffedac410e4b79. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b8a733d5-9583-48ab-9b7a-d97592c033c2.json and https://artists.proofprofile.net/proofs/artist/b8a733d5-9583-48ab-9b7a-d97592c033c2.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 0x3605d29d29b88c11620ee45da79bf85a71e25a13a0718eab7144f213eeaaf55c. 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/USHM80786086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5caecc66ce65802945c08664fb6c2c1793512aeec10b1822c806203f82da68. 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/USHM80786087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837ec26a81be7adbccd9f3caf75216a900ef1cb660ea069cbfacf34fc68bf25c. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/USHM80786088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ed3375022dd52ad178d20bc73458d9b2f04f06b577038692f4b54fed83a02b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:10:01Z), 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/USHM80786089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633b2fb40ce7f5fdd24eb115f3a3fad4f76ede37e968210a7759a43deda44173. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USHM80786090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63fceda2edc010c240272582799390f347e815dca2145696c7061ffc99de8f5. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/USHM80786091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d286d4e569c673676a49f94139b7362ec65af1ac5e6ce9326a038f0fb203289. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USHM80786092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0537b3083d6cecdee87df051170f3db65466acc3caf1d1cfd5dc5a48d28c8b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USHM80786093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35769c2a2fe6575f885eed45c9813cc5c37b624cd5c33479824cba8fcfbe6f09. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/USHM80786094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3152c16550dd2f4d53810ae28107a3dc111546bd4ee40571ac71fd0ca5ec74e. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/USHM80786095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5616e80cb6bbd67c4387159d074fece426343f593a0893adf89d1cf6f564b3a4. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USHM80786096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f457f8da046cf3d53af185c74831f1e3ed2b8732b3711deb54f9d6065f98d4. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/USHM80786097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c9f1ca627353e20e1a8165c132f0fa79145f2e806e0d5adf76da2eb9484d86. 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/USHM80786098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5469fe23597313e0f8d2664a0582e5c1ec353d80a5405757bfd8ff960ff8962e. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), 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/USHM80786099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c5ae2e23f3faab9bd98dee6f114d497c092e8d580df1071764d4d24d477fcd. 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/USHM80786100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5152616b3fb9beb398852e58eb59ac8931e61a53d51de27a5c3735e247e24f31. 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/USHM80786101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505b291659d3f77cd082762dff5ed808e42f8e57942fa5efc4ea2b256b09fd74. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/USHM22056200.