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 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 0x8128aa72d0fe250e871da86aa7030cfbfaa385a9f308621740241228eea5fb6c. 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/dc21a476-9b8d-456d-8a67-4723071c788d.json and https://artists.proofprofile.net/proofs/artist/dc21a476-9b8d-456d-8a67-4723071c788d.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 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 0x9b42c0d011448ad5d182b428112b3def1b5c29f358e384881ccfb67b9f07b151. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/SE6I32474998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db6648a0e308a19d630106c2ca9577be356d9606c0bedf531fd7cf7726512d1. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/SE6I32475000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312cffb49ccff6279c766164c66ec1a864b77f7cdb3a5260e843a7440b6af3f4. 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/SE6I32475002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac900809c26ef6c6fad5b287b8e9a3bf28cebc4cc6ec0c136c7a0ee064157147. 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/SE6I32475007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d50cd98dffd1ed19ab3620c30c21e9f174926adfd7a23ebfa892c9d699232f8. 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/SE6QE2492287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2dde53cdb4154938df0f8ed03028e8c02eaaed1ce6a2b25e78bb7581f7ad80. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/SE6SA2474801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2281f113da24a5f18fde004ae8e28164aef17410a02e57b11ef3925e20c7a424. 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/SE6SA2474802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d1fa9bf9f184fa658683d3f6c95e5c1a86359653b8461f679e187190df3554. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:25:30Z), 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/SE6SA2474803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed396035bd55a67f99d08b3ee07e46fc8bc0753eaf138e9f3d73538e14b3eb77. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/SE6SA2474806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce11ce5f987bf6cb92b976d382c7a3f21d1a6ca53262e5e5380403c0e4e62dee. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/SE6SA2474807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb918b7d2fa03d87e033a8e03667ad3c6112e2bac30d9435287910a38f478cacc. 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/SE6SA2474808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea609f97ebdb7e004b53dc5cb13f4d6af5f2a51bd4a53035fffb5c317e0135e. 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/SE6SA2474809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae9c3dfafdece22c278211e31ed0a58bce1e98d9bf2a4402fbba28806af745e. 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/SE6SA2474810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fe5c1c94b5ace356e1acb9904e4c095621b77c9943aefd2aa8911cb941f601. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/SE6SA2474811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76661afa62598fc4a82988f0cc4be07740433c323a117e3228615803483af97a. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T11:02:59Z), 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/ATBK71200324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c0ebd4d198dbdb9ff7bd02ee07906dbb8a0dc6762ad10b288dc9d4682f2564. 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/ATBK71203618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb262dd2fcde17db2f34cd84aa8e0ecd4c7765742cfc7101d4bc7a7e71d47ca56. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/ATBK71203619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd483a4afad8ef67364e24b759d175724ac715becc4e1a4d65a12057ca28c9996. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:02:19Z), 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/ATBK71203620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f965f426100a629b7ed287217993f71b93a99d9793368a4a77fd0110400f330. 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/ATBK71203621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46967b1421d3e339eeb07c55355a43dc9ef4d6416e70aab61ffc0d54ca8e837a. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ATBK71203622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab21fbd7c019598701d9a8ad09ef6293cc4bab5132ce936cdfb9fecdf4337d0. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/ATBK71203624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6914d348ce24098bf29f2abfa0b9a6f4aa8da3f7ffca18bf131166548ab272. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ATBK71203625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9aeaa50fa7bb14548c335b76a0f9418b76d24a0fe29ca08d9f3e49bfe41f8d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ATBK71203626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe15175f55605e925cca634e731f42378973938bc9b63f2ae92614ea6d3c3117. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:24:24Z), 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/ATBK71203627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ceaee9c7a5bb27705a2fc21071359efc6594c3fc020a3602569357c41d8dca. 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/ATBK71203908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9457e666679f7e931290accfc29db3ce9534d00bd3f08007d2c119f25ffa103f. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/ATBK71203909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f06d7d7a8b2625925f2c774c1970a12b3f71d55a0fd48aebb1dbe49f4c0385. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/ATBK71203910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670fb3afb4c41b9468d76411c23fab3ed86fb537dd752bcd9f5e501e9bbae7e8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ATBK71203911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbde19a3f7d61beeb6c0848e601c3da57a63c4757643dbe20eba38f21c6ee0ef. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:39:29Z), 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/ATBK71203912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e247c8dba1669a2d75286fa243a17b59a5ffa35ecf11896463f560c90c4a09. 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/ATBK71203913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca8fee01bbc343dec00c0913191aba4db866a0b54811aa587d3c4e2e13ddb83. 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/ATBK71203914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145ceac6e0a187fc3dfb0448be4e8139775e99cc1244a9614567d038b46c559a. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/ATBK71203915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1094b11eebf72fed86da82a5681416e2116fad5324e2ef923c8b1dcec7037aa6. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:29:29Z), 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/ATBK71203916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b042c6c103be781fd9e757d1a0da2e872d6b291d995083ac533363a84a87b9. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/ATBK71203917.