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 0x52a730061e5dee180b406dc494889ccc1b5b38cb7e2b6ac1316fcaae7acec00a. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c91dae1e-b581-42e6-b9c5-b91bbd868c20.json and https://artists.proofprofile.net/proofs/artist/c91dae1e-b581-42e6-b9c5-b91bbd868c20.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 0xad875a525cac428cd60418c250351ebaf02689f289ef5325b066079055e428af. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/US7VG1836808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47182a310905b72a867c1ecca3f2f88d3615395d9541c10123467f835eb8737c. 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/BRLWM1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752171e68e3cd562420bdcee544cf23fe0aeff650923e015239ae3b235d3b96a. 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/BRLWM2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474e25f6cfa2e47cc447acd2a8e5d6e855cce9108c56c81af66e6fa4bc702de2. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/BRLWM2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba43c7776d4faa8ac00ab08fc3c2c8c2aaec584cd51e8e5b3aa41614f2a0bbf. 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/BRLWM2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6d4e2902893a40dc70b1373221ff1779f416b36d0d3505d52d951a354ef4b7. 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/BRLWM2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6721228eff74cd57c8c186d63150ead47cd424c30cb7c9f3a30883034803cfa1. 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/BRLWM2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752171e68e3cd562420bdcee544cf23fe0aeff650923e015239ae3b235d3b96a. 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/BRLWM2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a226097da80d9c0bd351436d3731120a4f20360ce8e8e45d6630c068005771. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/BRLWM2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f573efb2a9af31431cf47e8b30484ac41041250628ebba8f1b5ff782c54a984. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:02:42Z), 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/BRLWM2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa89cfa281508e5872cffadcf6b6166d854990fba2463d79954302a41d34493. 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/BRLWM2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1dbe99fa9862f24f7376f6d7b3a169e672f19b338a5df93250f8e4d474b4e1. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:16:06Z), 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/BRLWM2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09b0ad49b04719731d8d1f57002a6bdada0a89ccaf2fdb2760fdd85b59b4777. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/BRLWM2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db80747f4338fc6d50952f151468c091225bbdd65c2f076037e1f4639a322bd. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/BRLWM2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d74eb2a32bc7e3214c1d7874803b03a068eac012b34dee328cf0063096bceb. 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/BRLWM1900009.