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 0xc4b6a806647297076ff7e8daa975f675c4b2ef856df22a90129363defbcf9ce4. 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/58d847f7-b34e-4d52-b1b2-9e25e798dd2e.json and https://artists.proofprofile.net/proofs/artist/58d847f7-b34e-4d52-b1b2-9e25e798dd2e.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 0xb99fdddb40141573cbb244b9a58ec414ccdb8e091cb4af913360a904fdc529fe. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZFYZ2128918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a25a25af929c5fce9ef887cf216e3c996c07ee97762822e1e0e15a862d3d96. 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/QZFYZ2128919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0406456984935ee86fb143397f621a97e84f048d9d49f78bdb2200b98c334deb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFYZ2128923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5faf1412e2192de5a987a60a2b95cb411a7eaf0e3efbfba90f2542b6630fc8e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFYZ2128924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207fb53f36999f2be6fc5e8d93014b777b85c7cc86dc03c9ecfcaf4ba42df27b. 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/QZFZ22164051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4779b01bb373ed2d7540581a6a99ba153a0713335cf3b59997282499556b3a. 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/QZFZ22164053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02d12820a77cf330ff1ab9c837a762b27feb5c5524195ea740e5d3c9e0fc202. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZFZ22164054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5960ca9f0defb6a4a429269b0d3b9357f27bd8979e3d2e05609b78fc693617. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:06:22Z), 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/QZFZ22164055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95987ce6058b79e8dc4b99bd14829b40f2e877ca674495cb36d643943954d6e. 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/QZFZ22164056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10dda15ec8cf6ec4c1125844e0bc2918314f8fa2088457e9970606bc0a81a59. 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/QZFZ22164057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e211f5741ee19ec15e2d64d5c24cf5152a4507032f3d55928e35eaf92f238bc. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFZ22164058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd814650d106a65002f7d5b5875edddcd0ce22216b1cd1c404ddc0ec90e97b622. 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/QZFZ22164059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61241104fb7b7e90cb2250fa1d50e8bbb56fb0e1156e3dfa1e741e87c39602a0. 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/QZFZ22164060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9858bcbb309b81903dfe4e8f903a1a67afab9b8ed8f18184e61d491bcfb3efa2. 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/QZFZ32147189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9ff53b7cf507321130d8a0458a031181a76f85b5186ed499b2d622723372bc. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:49:19Z), 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/QZFZ32165970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85185b29277115c668ece2fc45c66146ceed4ccdc44f9b3691aec3112249d9bc. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZFZ32178148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ddaabae1ef00e6f1c0e3b936bb3fd70f6c7d8dc65b032ab0212791034bbd12. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFZ32178149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc864c777efb83b3513d980817ea96f3714cbbd5003fae0561015a007a6709d2. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZFZ32178150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f822cb3936367bc2ceb34c71e39b04cd00d16dcbe031983913b71faabfebba. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFZ32178151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3559842628f2eec65f456bb4854e4cdf949f99263c8e94376e7baced50e56621. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZFZ32178152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75534015e411eef7b3f9e282a6581bef9fa1317173af5a441f245b5794ef907a. 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/QZFZ32178153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e84d02943c7a0b47c15f766ad74cafe0e2b0a9df16c55811cc5c1a8ad94e65c. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZFZ32178154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c521d426c705fdec9e630efddbc2c628e6806770f2d535f3bb470d1a026916. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZFZ32178155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29ef1caec0d73751a64f18f45553720f99d2b28974c90a98af62ee40dd4ff93. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZFZ32178156.