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 0xe5a1df5e35780d5a02eee24d85f035e7f1a579c576dabeaea4bd2b8f9ded7b2e. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/130404ac-3d69-43d8-a498-e9985c375674.json and https://artists.proofprofile.net/proofs/artist/130404ac-3d69-43d8-a498-e9985c375674.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 0xe45d4d9b3770b28ce25000a9fb4913f7b4af5b7ceca14ed0cc5eaac8f15b5ae1. 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/QZNWV2355563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdae32a5a751953659e25f05393667116733b597a2981742493a83b62a492c9c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZRP52210193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906f02a45afc9171df951d432b049507bdd322b951c42452d7a2b5ffd3531646. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZRP52210195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5f4e893537ace64b0b16d36783e76ca71d318a4c41140e2abbbbae740cbe1f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZRP52210198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97251b60df49634df467fbaaee5336f26696b51fe9469675995e4405a3e53fc2. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZRP52210188.
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 0x1125e2a25bdcdfc249129cf072490a913412818896578b3dad296769768913d1. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZRP52210189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ded88a5db3f6d24d583bb7565b64e66d63b81f6d3dcc1bdd0a8856913847a4. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZRP52210190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c2af9c0d39a95b4ee8c78c22a5fb36fcf93587dc8a6833a8677783182643a5. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/QZRP52210197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a7424c407cec1b3768f4550e00c16890437939b0d36e09527d99c82c8007e6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZWFL2473853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50f39e3aba075318edffd5710e25820124012c8ea0855089e1a4642da62b9d8. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZWFL2473849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabb59f50280c9b07fe8bb92cb6a1c762f55e169bb3377258b4b39691334ea92. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBSMU8869679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dbab7835c48de13ce68f6252c26da8039cb775e0dfe5d014d70f6a9db8c53c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWU2142299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b658eb195e19179166146888292ee557be3fb55e3662f037717fcc4c7c2d244. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWU2142302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8474dd6932f7026ecf8efdb25bbf2392e75d83292bd2539c83dd042fdcc80d89. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBSMU7976106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a999c40733a4e7c220a25b5b4ea5dbb673d45ec598d352753f9d6b242418eec. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZDA72096254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d85d0bc0dc4d39e990a9c8d5a53835c20995fdd91933ff171aeeec1c2c1745. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GX8KD2434873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2b2236409c5b0a8aa135c3eb37ae344387f6b62d8004e40f2cfd8431f90ac2. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:59:57Z), 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/QZDA72096249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5129231065bdd3f45cb81c0abb283bd5ccfeb7ec2f50299c5ef9050cf510ac65. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/GBSMU8869718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3168032f363f061f7b250fc27a03a6f259f81d568f767855ebf1a1c85aa64aaf. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GBSMU8869731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69da0e6a1b276a25f8db7086ebf0f852581633e5fca75c2ed40cfc8771efa155. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBSMU8869756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29f9a797875512d98b9ced77e40193473cda4cb46f9cc1450c6b4f7515cfbb5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GX8KD2426183.