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 0x8d4827e5e0ca9f9e61d8b1ca5f34d525dbc62b593d88e84f7c08b603a67ebd6e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff2f33c8-74d6-4ae4-8afb-c222481ec57e.json and https://artists.proofprofile.net/proofs/artist/ff2f33c8-74d6-4ae4-8afb-c222481ec57e.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 0x4825673e9ddb5f7c60cfa625e6de74d6d401f51e6ed41913800079c5e19097a1. 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/QMEZE1712729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ae337fd210fc23135c1ef479e27fd5205bb73ae256e8c9a34e8b184a2e54dd. 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/QM6N21919625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc767cc90132956526ca164e92e0fe38667424610591b2c34413717e01f90b6. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/GBLFP1936423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a3825ba96d3839e220351b620bc740c775f2d20f3a149f3d788cd87b4ee193. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/GBLFP1936431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2e756b204eba1b9d3903e98ace0784cfb21bcbc42631e6981d0b18776d682d. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GBLFP2176321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009ec3ffaf10484891812633dbef06ca2c935fabb86dfe1e3308599838332582. 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/GBMA22162484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8803418771fc43664d252e260095c42ea178df369f659b34e6b9680f7a590d7. 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/GBMA22177543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5a6308febb52c30996630c0ba27653af3705636faee2a1388446292d5bcc87. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QM4TW2361236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412dada666082d25f750409d099ac48e4b1b074d304ff76c3a3c8529b62cd889. 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/GBLFP2331478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265630edf334d1c73d3815ef78ccd03b372fd7b9e96357ddfbe09bbabf09609f. 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/GBLFP2349483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7caa8b4cbdb6a7883216df93a8e80da0537734e94e1d3a8a9484a6c6bce8fc. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:07:00Z), 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/GBLFP2387270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4066be3358267feb2185a05410ce7b25bc8bd0b025b376464b1af805f996bcf3. 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/QZDA62451444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7647ae4c82671650f1a766d969f0cd237ac80c9e9d728b9776b8a82df962cd. 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/QZDA62451448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac6e4caf07308927f1c2655509eb335893e083c19cb60b74c8776addc9db17a. 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/QZDA62451450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9be46c8dcba8934ccc89708210331c2cddbc351f200e847fbbfa9adc05ab4d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZDA62451451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328c6033db814f506f60a749f76f9f2e7910631b2c6a3d1523f997b9fcc79a33. 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/FRX872198900.