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 0x0e4973789fa518eca6ccf786f7be0b8aba58e4258d089ca266efdfebe6b446b3. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/697cb4e8-cead-4b7d-84de-63bf961623a4.json and https://artists.proofprofile.net/proofs/artist/697cb4e8-cead-4b7d-84de-63bf961623a4.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 0x5439c3f22b1f1708c553af39120e8ca09087ef3cb20bd029f99428f426425097. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZNMT2563803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0182defe9e85103896e626239204731da25790ac5a53a49038d0d28682e0585f. 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/QZNMT2564247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2049d1ce3eff94bd0a82a2acdd7fc5e043a896d631b3f7da9880e17f011160cb. 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/QZNMT2563802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f17becf72befcc5ee7b5894910d131995c88f31afea5254f13a3a0a98110fb7. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:35:45Z), 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/QZNMT2563805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e529dbf135bbb0ef225fa0013c3ba67f26ae0c551e0e5a3297f6985d8ae497f. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZNMT2563806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476e20dc18bdca9484e7ae60e6aa09758fd290c3fffe0673ed1e4cbfc7055c4f. 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/QZNMT2569896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9f81dec1433b28fb11c7a65adb89ce0e12e3ca5e30c4cdf058252743463eef. 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/QZNMT2576392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4c4f037e64c120b783eaea541bcee8d170ef25053119dce4a7e7aeb7b485d6. 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/QZNMT2576390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7e3ad908b42fb0cfaa2dac9f6db581713420c8586d73b4a9a83d8c0f5e4433. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:04:28Z), 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/QZNMU2529050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d70f6443548e6cbcd4a0f6df4b5263517d9a353b10417774ad34311b575bf04. 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/QZNMU2563599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99e2e2e61d8a53651cc25ff92c6321d4f6f0ef2d6500697156a559fdd41e349. 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/QZNMU2563598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae21699e097e892702c2eedb461fdfe737426dee7bbc2071f9c4103d58d641d0. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:05:09Z), 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/QZNMW2545685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa787bdcee96957c7ce20510a98309e1baae630b5575692182655056169fe6d. 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/QZNMW2545687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32046d1c2d3fb11e8d372e70915466a552865dae7c1c2d24a071d0c88f5eb5b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNMW2545684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27b5829d10c24957576af7f5b775973b3f875dedf39c811df00b71ce95b2439. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZNMW2545168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5460913a01398e43e24eb8b3ec51501ef1fc9c8747d3d931f911fd46f3088c15. 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/QZNMW2545166.