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 0x264f7502cddb6c418a22414835fce42ac0953c22d4b5969aaeba98bfdecfff53. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff2a0d81-cd5d-4f02-b271-d3396d42c7da.json and https://artists.proofprofile.net/proofs/artist/ff2a0d81-cd5d-4f02-b271-d3396d42c7da.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 0x2201b9d0f6ee2cb3f5dff9fd7d3724b3076a2232d734610549925356f1cb4d10. 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/QZHZ42006844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578dbf0a9a61ff313a3294069d7d806ea5e4ae54e603ca2445667e129b61451c. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZHZ42006846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715ce4b68a69cb4389530575b18a1a6d2e8a058b45cdfe53ab14b536c12f6092. 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/QZHZ42006847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f14d20c38a3d6a4cbbf0cfb794bf6d9827403fd15a172dd34f31ba62404c59. 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/QZHZ42006848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469d0456a1c3c17c846b703e91e84c28881a6f24d72258f43c1cfe2360574f83. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZHZ42006849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ba0e677e0b221d79996cff5eb56bec8b6470ed933f15cabef88a5aa9f6d96f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHZ42006972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ba741120bd3284ac05210a6e9d3a96c1ad3a24aa0e469db94ac94227680120. 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/QZHZ42006973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced020a898f718b4dab23b241d0decfb92d1a0e0eb7884f879028f4e039bcf00. 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/QZHZ42006974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15ccd8b9cd0e87582cf3f3e3302a00155e95690c246965e2f684ec9980dae87. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZHZ42006976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7bb94f8a16134436c99ffa798941d48a9e14f1198ebc8d010100789b5bab66. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHZ42006977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a0233343de55214714c7b6cb7457a6f1bc4eb7976dfa4e9a4a9fda40db84d3. 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/QZHZ42006978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a516986646a5c5e10e19a1d599cd029bb8b32dde31b8135684ca90b1a574209. 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/QZHZ42006979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d9693def5863807dda7083b311d876cc6a1a340930a06349c4762442464f6c. 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/QZHZ42006980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0600ce18b0a298ff510051b9fff09c5aec1c7801a57e59d4e20cd429dbbf86. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:05:10Z), 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/QZHZ42006981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e53b22bf02874685b498b17e0c0e2f1cbf5f78a527aa750b7e2735ec8f9040d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHZ32073648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5252a8f46711b85b66ac99a8642add32b3ac3dc0848a33819166c0862748db6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZGLM2218998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4338c73ed115945a37b9e82de7f63ef05d58eb3a3aff246f6dbf4eed9c6932e0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BCBQ22200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21be3aa561136739632dd6e507df06425588f318394356b187683f3f896df59. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BCBQ22200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5dfef610f520e969fe3e04cc815b48acd1b241d37415f76c6ab13a8fe12c7c0. 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/US7VG2469372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab153f45e6f9215b097d207b149e2ecbe06ad1e9ed5fd3c2d5dbcb74b8d0dca1. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/BCBQ22400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781e582c3f2c3de16b868d09673a800ee07b7f6a9fe9b80d2fb1022cf3979177. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:24:28Z), 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/BCBQ22400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0b64fb2c4a1d27dcd979b24a9bd1503be9b75cb413a3b9b14764bdc5de59a3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTVM2485251.