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 0xe018400772d35632ea35ddef2911f85fa4c6e04052a048a5a4fa7a64a95edf7d. 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/dfe47429-aee0-4b27-a376-ee439225effe.json and https://artists.proofprofile.net/proofs/artist/dfe47429-aee0-4b27-a376-ee439225effe.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 0x73c0af203f1184a99fafcdbd0c87323075829c841f3082b0b3de0bbced9e8205. 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/QZHN62400256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bede65b62d72d462f33a1ca23299c31a991339fd3b94459c224950431f17935. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZHN62400258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddddc89c7c0ef9fa973f7e3d0900b3109fff1363cb5ab9b996a32ea132b1b377. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T23:03:24Z), 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/ZBZAY2400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3563d35f61fd00bf840fff6e5d79175426f2296faa066176a37b84261223cc05. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ZBZAY2400115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5c614182855cadc2139920de7dda19fd765a78c2263948eed000b282cdb988. 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/ZBZAY2400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2acdbfa24d440f2cdb27d4f38588a87de4b7a6ce018f93cd920f41ac9d23a49. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:08:41Z), 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/ZBZAY2400117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cccdc4b6442b0d3b9970d8c1f1eab822938438c8bb148c35feb2bd8b787a626. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ZBZAY2400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48cb289d3ffae9182a1732c07c62d4f2a6e55590c4632543e45b6ded43dc4a59. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:05:05Z), 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/ZBZAY2400119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e72531d72dfac8fa28ab2bc54a78e6239aa9ba8b8b0d831ee588aab177e035. 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/ZBZAY2400121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc9f8be737f66af6b8800fe670bdc31ebdfbd6104eb5e96ebde94a0ace24709. 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/ZBZAY2400122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c966481b6d2347f2b76893e86aef1400a37cd1d7d1a767c9e8bd6f300d0caf. Chain 2 (Bitcoin): anchored in block 958124 (2026-07-15T10:59:07Z), 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/ZBZAY2400123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc41e68c83207dd9b44a6d82eda5d0ab753661944430a18748cc05608c393194. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/ZBZAY2400094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0831b57acb72271834e9e6fe65cbabd0ee63800a707eb192ba50028672472aea. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/ZBZAY2400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536bae5a0fcf7932ba191327125c15e1e1d7d2671ffa7211be94cc667eefdd07. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:14:05Z), 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/ZBZAY2400126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b9c9b0cc90edd1df3cf742dc4637c8e6de90bfe3a8fc2ef7bfd135450bde82. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ZBZAY2500238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc328a6a2b4d857aa3dea5ff7baee20cec05bb46284c1204f16ab5a4576b1025d. 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/ZA56E2419813.