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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4824c222cc8bc64f0617dfb7362fd8a8cfc28460856c13c44a8dbe84e6b96869. 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/71716b66-7c21-4202-93a5-30829ee5a5d2.json and https://artists.proofprofile.net/proofs/artist/71716b66-7c21-4202-93a5-30829ee5a5d2.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa579157f127e8230e73e8039099a5271b299229b3b023b760ebb1b7d7412ce3d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZHN62359926.
YODAWGIHEARDYOULIKETRENCHCOATS ($KILLHOLLOW REMIX)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada805c2c4a68f3913ac4e3db181fcba31c5a60da3256c5b9923dcaa0f86a810. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZFZ72466137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc313f2881be19b7c316ba135d2e06d2639f0f6ad2d722685247c9010333e3fb6. 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/QZPEW2466289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13dd4cabb92e73a613a7f5f29665bc47a447308fef11e36bdd2cbb23f72fe793. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZTAW2378088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418c9dfd97e76712af7b9ec49a642e6115e13ab10c68e79bb83c6e1cf8a422f8. 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/QZWFG2398724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4879423258a8759d39e1f82baf32cadb4e8ffec0d619fdc8ab86b423c1543fa. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZTAT2345120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa31c2090d8bd9fa48e52f28998a9ae1a25dc673695326a8fa845ae6f9c9000c. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZPEW2403741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6b75597fafd62de17273ed41a69f32c5c9656384ef0c0a0e84d655b5a121f1. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZES92430162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07054c60ce06549492f9ada57579d1f45f31c8f87b6546c5e3df822024c5d5e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZWFF2319696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368942bf0aca8a3685c79af8aa128843f2bdd75189864ccafd26a62f823b7065. 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/QZWFR2469354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e3e7a4e77ec3236fa81599726126a76cfac4b1a08ca2dd84a2b88913dd3c09. Chain 2 (Bitcoin): anchored in block 957522 (2026-07-11T04:46:56Z), 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/QZDA52562697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a8db5e9215216749697f054e41315ab5b9cbecdc8d78a5043e63599bd53e04. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZDA52562698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee9c126f5c400320ba62a3f2cadc89181355b5972c53feed8fdc6036e67255f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZDA52562701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e133cd28857def49c42a68ab4233052b00caea62c4865b9265b2879a8f6b55. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZHNC2595191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e196fbaa5f4c53adca377e6c4169e827ede8d048cb78db55e6fb84f757ab02. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZHNC2597231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1f05614c20640929077dd4ea201fc1c0cc0e784fc8a4da26d86b648570313a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTAW2514300.