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 0x03334a32f92cc1be46af4d763a7a0d06a72d96adcfd35cf8ab46dfff17c573e3. 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/2330c334-9a0b-4f9a-98ec-266e29d9565c.json and https://artists.proofprofile.net/proofs/artist/2330c334-9a0b-4f9a-98ec-266e29d9565c.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 0xdf5e8168cf4bbde85fe848d84c3afdfb5ece973d9ac213f45f6395485437b52b. 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/QZK6M2103687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3bd85ae80263de11e40dea05264aceae7e0687ed4c49cb4211e16f6137969e. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/NLQ8D2100149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3941ddeeb4acd5aa04a78a66392477406b0d1565193ca01314c0aa124216d1. 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/ATEK02456117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4954fd616ea3b32931ac78e1de389a06d6f86821b4ee5b40967dec613ddd76. 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/ATEK02456078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacfe181d241d1722437d06c4df454c36e0d84159f5ac6d121783a68ba77de5d. 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/ATEK02355321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc5970b24846f16a2d0b42ae21af2158a7e8a09d664764a11f94181bfb18ac3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ATEK02277583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f185b9c88ebbd1fc9dde932f4169e611f16832a4e619111009a8c6875f0cb96. 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/ATEK02277573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fc43ca95c3ab7bd5bc2e3055d1d03603509b2ce234831da631882c0b4502cd. 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/ATEK02277253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70859656d87b7647c27e4504c5b23962efc5305f2810f48a4b28bc6aba9206e. 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/NLQ8D2200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e02fefd4e330eb192ea1888875b347f0f3b557fde1888b1e3a05821959decb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLQ8D2101821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b00fb373d8980983f635bba764ce231659c68bc6e0968e9119bf9aa502c8a85. 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/QZS672154347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a06141f84d8755d8381d479f1a480e5500f6f8e84baeb3d2cd6ae27dfaa269. 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/QZPEW2524366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6595b52d54499d29505ec96d6c32b78716b31092290779d61d445d3d46b5cb58. 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/QZVEM1838911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5db4d622e739bfd1a8232f289ec72c8ad11b50794a26d1c58c9166862e4c96b. 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/QT2VB2470938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae21b0c73c919b5ad66c58991a2f33871a15d6e0b50061616c956662728323d6. 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/QT2VB2412426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6df5b6c90143bc54de81bf148304d30ee6957d08e9d40f9646979f30502663a. 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/ITA892400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45b052b908184c68d5bfafc0ef1296d96746507eaed1df8864c02ac7422854f. 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/QZNFJ2206710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569c72a8818e4ad1320f01795c6fba20b05a42b9d7cf5879cee4725fc4ef2990. 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/QZNFJ2200790.