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 0xe7086e27c3a69521b7edaca820e640f73b105b9128d27160cd7e908e6967e08b. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6ebaf703-14e4-48aa-91ab-4b4fd19e8048.json and https://artists.proofprofile.net/proofs/artist/6ebaf703-14e4-48aa-91ab-4b4fd19e8048.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 0x121938c3d42a59958ed5c6b5a452952bec8f91277099ca65964edb145f56b7ca. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/ATT592300701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee2ccc23cd7add7805c22dc0ae9e151756a358c6dba4172fc31563db3af22c1. 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/ATT592300702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89f4037a7990e14fef40ca228d0e2e7afb366d8db8c85e6c1219b72c9eb8925. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/ATT592300703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e743bfdd3bd9ed7dfc2ae7502aec28b207ea1c5f08fb795706a0823412e977. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:33:39Z), 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/ATT592300705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d62e4bac71975fc375d3299ed2b534111a8296abc550f0152674ec95fd56ec7. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/ATT592300707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06798692f07664e7d18b55adbb757ebcc2a5cbf252d47322e0ea61d75556b21b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:25:41Z), 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/ATT592300708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938626f22b20a7e261b8aec58c9e325453f33a358f4dc5522202eff212f0be7a. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/ATT592300710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965390a786c7966addbacbf414475e60f599930c0d501e3380c8fd4417aed1ba. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/ATT592300713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6502248c267fad75ee5c2b1dbac05f3f40e43f12433a402953875fc72e296d3. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ATT592300716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1864da75e6a2ac24d8b0eb2f152242640601d4ba13b1e6c67530e5186a417dd4. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:05:32Z), 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/ATT592300717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a8e550ee507f2d944356284a11c6acb6000bfd1d279049a26b0214ae9b3ff2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ATT592300719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7cf82bad54d5bc8bee458aee53960f33971dd64446382637f38824c1bee24f. 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/ATT592300720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f5ad4b811ad97cb3c5540b40b8b8bed8ee1d1e40e4c089423a7d5dc2dc178b. 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/ATT592400302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf173bc76e4de69daf7fb8f2f276c9fbaf4c9f79a7885a604471c23e99d17b770. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/ATT592400303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa808fc0477454a1086123e3735172f03f6501403b93c16cc1b55597f952ae7. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:48:01Z), 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/ATT592400304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946a495f0678e4b70460e22c5cdd24760acdbd4dfd9718aea8514c0a571a33ed. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/ATT592400305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9617ed22d763d2d2eab6cf2f186d83fbe171cf101db8b22b58e8a45c6ccb42a7. 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/ATT592400307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d445adecdf39c083bbf5cb147a4a2cf7a950e40377beb5547b5df843101fedc. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ATT592400310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cca7b565532608922b1697f9fca908fd73bb8100892c763be6472879b9f49f. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/ATT592400311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d703ca08a7a30541ec481cd7eace600ee3ba07ea7c9219565be422d4aa1df6. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/ATT592400312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835e945716bc6a55c334d21746ac48d56f92129e33af5690a3bd35a056183e39. 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/ATT592400314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158a600c92ccbdb6ebcd9a4298d20185339187213b51277ec36bbdd5cfc44a44. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:25:33Z), 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/ATT592400316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed60069a31794277e0574eb75394b398ecc0d83082f036fd69f2adaaf42b334. 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/ATT592400317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4cf454af92bc70a318977a83c36a46f80081be896d7f220a02abdc4d7f7a84. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/ATT592400318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4c0bc9a89d3ddff1430b2770f8244a6bd6443ef2413533344f64e9de95b090. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/ATT592400319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77e2fa7263e1e4a99cd9d5a081811b3d1bca40b569caab754a5c93770e67765. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/ATT592400320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f4b565ef9c4478c648a7b3fd2af9c67bdd0547ef3125eee016b7f798700cd0. 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/ATT592400321.