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 0x8095f2f15f038a0d02a4b7aafa92e5048bb37c946f330c9bc9f6e723951c1693. 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/2a071c30-8e68-46bf-86fb-7e6e64b005c5.json and https://artists.proofprofile.net/proofs/artist/2a071c30-8e68-46bf-86fb-7e6e64b005c5.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 0x551e2fff6befbe4dab22a0b7eb2c34e5b829a21436f4bb6bbfcbdd476cda4a67. 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/QZHN92045224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9d068402bbe25faf9f108629d31d6b08e32cc159011fc844b39f84e2aa837f. 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/QZHN92045225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1c0ed868fdb00dc91dabdce765404a59d077271f5d6b7bf7a4bae69b23aa7c. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZHN92045226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d6bbf7935fde15a7a7a0c71d4c74dbcd172b54b8e4f83cdc1d84c57df7b9a8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHN92002275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29c353c40f3de237808d38a3d051e32eb1a76489036dd2b6be0e9334acb304f. 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/QZHN92045227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8c29ff447c885d8b0dbacae37a9cddaac029d72f6361dbeeb18abfea2589bc. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHN92002277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7d90b42ab021ef56be36fc131c59ae941623ec349a359baae45f6f5b3d8bb0. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZHN92045228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ba5f2d984011b71c88973e2c9baf1a673b9e5df24f852b147547cde8629d2d. 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/QZHN92045230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800b33b87b766d4561a55357bcb8f08fe38e2712f42744ac89773617ade72aa0. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T03:16:21Z), 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/QZK6H2019758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf2c7e80bdd48520cb6fd9045ea9471def681fb2d4c304ce9c92f8a772ded1e. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZMEP2039848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4653da094256a214c63cbaf97dee7f25716720efb96feb3d1797d8f2e31dac. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZMER2087067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cee8522f63aff13e08f2a6a04f223e19becb3e326540262bc5c175f5deb5f82. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZMEN2026838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6834d0f8596ec26a51079298e2c0545afa3e1baa37c3bd6ea3eae2cf2464a744. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/QZDA82189452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22645f8bb031fafedc1cec0e36aa3572c7af516c59e6f6bf1a1d99cc48ae4081. 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/QZES92136411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6895a03697a91596c201db6e13b60a21ea7a679a35079912ebf8a86328aa4163. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:04:19Z), 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/QZK6N2186316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3d8f81f7919bbf77d1b70f30d006b117305fefd577bb30bed3fd20bffa919a. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:21:58Z), 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/QZMEN2198598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34405f5c9f46c67f73b2c41105fa132141f82c1f5c768dda79e9046f6179a10b. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:42:42Z), 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/QZNWU2104928.