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 0xd776aec7fcfca03dece70df34649132f77d246d9a55cac61b3abac6580c4e75b. 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/a74998ac-6d17-44b5-ab7b-aa252f29dfec.json and https://artists.proofprofile.net/proofs/artist/a74998ac-6d17-44b5-ab7b-aa252f29dfec.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 0x11ba16b96bf74192fddf9ab238ad87ebcf337f176b6463254c52c9735f25591a. 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/QZTAZ2425568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5146f598ea1751c51777a8889f14fcb067762f7977e4d60abaae141664a8a8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:59:10Z), 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/QZTB92434653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf095bb613bf0222bcd9295ab54508195fe220bab7d251e0332bc593dec283f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:01:23Z), 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/QZTB32403860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908e9e74f7dd0e3932f49eccb8d3c8ff54ec997f7619e8ef540ff1024f1c84b1. 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/QZTB32407725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ad6966181b50e716772d9b2894b1ac9738320f36ddf6c13ffd444ad69ac6af. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T07:54:45Z), 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/QZTB92458131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6aa2bc322f59bd15d7321b6d0736ac071c18d8aaa97bddb908ddc23bfa3e9c5. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZTB92416577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c30860d629832610641189b56f14b85f4757869161c18ce7cb04429c6c6100. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTB92461447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9cc07c07fb317c78a968f8d1fcca6327e4dccd736a604f32e521b845ce7acf. 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/QZTB92462723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c51c85a942692f73eff3c04e8b16045b40d3c66cc984164d266fb35fbdde35. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTBD2452429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5776ce7d09202923b76f46bf37ff183eeba9347b2d41c1849a3f37bda8b0e1c6. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTBD2437870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf64501d581462e03f0fb47ffe5341ae8b92379871901f953eba0522c56ff66d. 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/QZTBD2441312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82e4f9bd9830f6e5d7d9334e7460033cdd8c098f51c7816986008d64579d42a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZWFK2451237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2207c8ca41fa3631c75d7c79a33bd32f5094ef05b41e9c7a884fe02c496e2e8. 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/QZWFK2454890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c529b7d1d7e465f4da032a356ce25a53b4b2f69b48bb57b3946763c0bf4b65. 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/QZWFK2452865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852c9c289ade6fb69d79023d52f651ebac368dda0790bfc85c6c35a4e5578d9a. 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/QZRP42411915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c0ab3c5faecc0460e674416d1ebda9ce3300b057a44b695e19e8bc68aed536. 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/QZZ7U2410905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0c78b679e62ca65249a0c55fc6aadaf47844d5d2c1e35da003aad97bd2669a. 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/QZZ7L2459793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4a205053ec1d5b2f01b5e49be681d729820f37babedd2dda73a227e8ea1450. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZK6H2531712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e87f4f1219858369a8543d3e64ea4bacd13f839eaff0c43703b923e080939a4. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZK6H2561423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23de0fe69b25dbfe1326d41133bacdeac2e3a231b0be8475b87f1d4890e4f8e. 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/QZK6J2505928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4593be3595b23c748ddb3ec379a998861efd5087369c46a852a0959f4210c65f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:30:58Z), 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/QZK6H2561435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa312a33aed36fbaaa909010427eed5c619764f16f1e0b8c6799ef78ccf580c76. 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/QZK6J2584205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff8709f7fd1fba53ab5799789b06ad2231d9839cb2e434d35d197b970dbe8f1. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:02:03Z), 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/QZNWZ2551714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb176081b17999cfa306149ba356012d97736ceb337f1130f5fd668aa9ea6dfe. 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/QZTB32515639.
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