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 0xc81b51df2d5b980e7f9bbb9bcccbc5336479e76ab383897b0eac61253e5bd1cc. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ed652d4-cf67-4dc1-aefc-c32abfb63473.json and https://artists.proofprofile.net/proofs/artist/2ed652d4-cf67-4dc1-aefc-c32abfb63473.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 0xc795ebafe14b64462b7937a52717fc7fad9d1b5b1eb4e56d815b17e2b321c83d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAEX2019337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf443856789158e66f7c2797d472ffa708c3315b7d7dc6636980ec6b202091e2b. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/TCAEX2019351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4561e1faffad5e872439c379328223e8434357b445207e1de04f58402a9e0a59. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:14:45Z), 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/TCAEX2019369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea431590fcd7d2e7f7e875f2a00051a2ff49946aaef0d5531eeff83c31360a4. 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/TCAFB2012212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5925c6a7e3f29c0f7d7f7a1bc36d4846c41d0839feffd48dc0c58e7bc36a132d. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCAFB2012216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d24d50d5a76079595429401e2e48fc1dce0f4181550c393962cb52e87ad0c3d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAFB2012218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4742a52d6b92f19599d323211dec65152732fd6bee8187a9d0dc0ab6bd212427. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/TCAFB2012219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee45ca424fd5b9ab84aa332fe48bfa2cc5530338a5e77d6f1643535fa982aaf. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:22:35Z), 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/TCAFF2099006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d950b93ea3ea1086da1ff49b4871727d0fdfcdf348b0889aa607c8add380f09. 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/TCAFF2099022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffd56dbda2db8c7f88a0b0f58fa41f6112728ecbe7ef138415de73f66057d38. 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/TCAFF2099024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c2fc8aebe7ca9a70a650c67033dcc541101645bad6fa9121d9c7cf14b66b6d. 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/TCAFF2099033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04bbbf2a24bf0c69248a7059096345fcca2eb0b0d0f94feef1b9cf166a37baa. 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/TCAFF2099034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9ce8ae35c4f57fa97e25b9406b5c8ee587a85567ec7089d0f0f64b8f3e7eb3. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/TCAFF2099035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c61badc8e28f64f2f9b93960e9352ff7153fc00b16b61c4c176403eaf0f3419. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/TCAFJ2187923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f2bbfb0861275dba3d1a08739032bcc6be3bdc6bbae8a2defd6d7357d61d3f. 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/TCAFJ2187951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31baa6330a18173bb804e561c9710778338901d541ea50588fa5ea14168aed1d. 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/TCAFJ2187956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfde6c67bab53842a3dc64ed1d4e448bea806ac882c64d85e959c41ecc06571. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAFJ2187959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0dd17cbacb3bb793a5eff43eb1e9eff17901e11da1546975fced3574ccc099. 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/TCAFJ2187962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c8df0642f10ae48a1b5f96e5c9e167eadabed86d74037397e1db9968ae359f. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAFJ2187969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2e6c678e0085ea49ee74752870101fea46e71dded04c0ae81334bac50ea65d. 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/TCAFS2185205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91427bd330417fd63cf41a90e449d026cacfb28c9d995b11ed28208eded4122d. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCAFS2185207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d44109af01d535fd00c3f2ef4234dff79b0d038d8fe0e2d8694984f9cb4f24. 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/TCAFS2185215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014637654cdf4c8cc1e4e91503c1e9711a60f718505acfea15dbf44b5bff67c3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAFS2185219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714232ac6f573017fe97cbdd6e4fac5d4b71f9c6aa9bb019b81d61ffde9b180c. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/TCAFS2185222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e03a3cc365dddaacd986c6869f36f717480d428db7cea2de8e4f0f88b0f1a9d. 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/MX2832509869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9932f7222d0e738e651203fe5096d320e080fce14aee1ebb09879673dad63f1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/MX2832509867.