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 0x4d2c5b97f70f295d444c8a00794af68e2c096f34785a2ee03df3eadf41a702f8. 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/e4fe6e38-7b95-4995-bcdb-214a7cfdc987.json and https://artists.proofprofile.net/proofs/artist/e4fe6e38-7b95-4995-bcdb-214a7cfdc987.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 0x9a8dacaa13dedd83a60b7b80b4a4222e27a8c3575751bd62d69508b5a83a2b80. 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/UKXN22598917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1725d9f957ee36ef8b8f0d93f8dac9a095fce607aff392386a3dcf6aac91093d. 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/UKXN22598918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1040d1e600f355426fd9eda7446ef0637f31dc455fb58a6f051e85badef0d6. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/UKXN22598920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1919be8ea5286d107f044b46a206b53035eb6e487d44837ae35fd4977ff56631. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/UKXN22598921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b32e8366a6b3127c03dd7edd5bba9630af8c6a32adb71ee84b9005893904e71. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/UKXN22598923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5142e3f921864b834335251850d9235242c383667ae684fc1ec166c2bc682b. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/UKXN22598927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad6800682b1a17973d04e18dd2f349abf3ceaef436e1b004eeb996c87fac20f. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/UKXN22598929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716c07c1a1dc53670a51310b6530fb03afa85d04853c09744a2f92bbbf124238. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/UKXN22598930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c273990ea7bc5232850897768ee495580af125b8814f6bca732e2c2c0cf1a42. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/UKXN22598931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cabbdcbec8c585df39c36c7a2937fd2ef2fbcb971f7d569ffb136b978ec6ee9. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/UKXN22598932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79216ea22deff0b1a53cbf31ecb86b72a40af8b0bc71d30627799af408fc35e6. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/UKXN22598933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4790c0f029c07af6f845e528d4eba50072ff29aff1cc992399b2e21ce25a08be. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/UKXN22598935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e45b5e77752de52c7b0de6921caecb94c36f12ff3f2f5d8ee3213ae27b7807. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/UKXN22598936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95112cb9f295b14520035c63729810f227b248856691fc771b25c89171160bcf. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/UKXN22598937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43477746a9bacdfe4232f8c7ae9198fd2869328de1af25c029832c2f5d8eeef. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ATR981183643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc07e2b1f6019959322b98faec7c92f8bdc7a1f2bc7c671d83817972b3dd7fc1. 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/FR96X1883421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d05ac2fcd290b061b9fe41d03ed88ae46dd292205f91d5f27a0c8c844637a6. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FRX201839347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb588e059e3577c8bc8980ec267fe8254d641cc3146f05a51e4a1c4c56b957e22. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FRX201839348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf5ec1034df90f817831acd11ac4da5ca7d7b5e825e6ab3b5552a360085d285. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/FR2X41981753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf8533db9c5e1cf619211cef3182a60255b8d8c3237cb83ca2a094d26c8ed0c. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/TCAEH1995115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398fb934069ef77c263baa20c12b470661e978a9d872e9dfc3fe1f41e631dc70. 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/TCAEN1999765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb609a12eb4af29cfaf29b6adfc3d6f7a918b1ef400eb278b81a6d6ca24f2f7a1. 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/TCAEQ2066077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df8fbee9435595b9a4f2a274ec81e603106532f11b239f9e0070b88281c7ea8. 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/FRX762035942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec110a3eb984afc7229ecb006a5626423a163681b9958a53bf35a241207f3b4. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:07:43Z), 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/FRX452167890.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab26066a2d2d7dfcf69c5641abdc1d7f102c65753056547ff5b3e4a998d18a19. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DGA052480217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3453a9124e5fdabf7e4e58928a89834a1ca6d9bf1cce6cc9f3168c099db1e6aa. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DGA052408977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13a17e9780346c0f13c7de61a7640d3416104537f5fbd4f85568a97e4723d5b. 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/DGA082496557.