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 0xcee071e6228f1e4a8353ade374e8253a73d68b789e459d16b558e10e900061bf. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97be7eba-e216-4d5a-a539-ece425cc1ac2.json and https://artists.proofprofile.net/proofs/artist/97be7eba-e216-4d5a-a539-ece425cc1ac2.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 0xd8df9944a3b9e3261f6e60a31c85947cbcae389e1ec823052b2fae712e9590c4. 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/GBSMU2360127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec63aaa236df07e44b2006ed028bb4cb5b11940c1a7b62113b3330ec42b3562. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:09:44Z), 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/QZ4JJ1603563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263f79b44c2cf8fe419e98c7404383b236cd35eedde0d0197d7390c22c7c0b9d. 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/QZ4JJ1603564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81147c621e40c1c7ebb0cf7946eacc844a98b5abf87e14e73a575229a8e4c4f8. 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/QZ4JJ1603568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf61ce6e57cd7bb5bf54eef02ab1573e0de80391e8feafc44c0240255b457058. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZ4JJ1733402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd6b221bf5c49138b4a74a0493118f773395d90183e6cfc96a6121cfef650fd. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBSMU3950937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe93fadb39e0077c5fbbde72cef3e5df152ca900f9731ef923e473c69e7ef542. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/GBSMU3950938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6409b815616ed3b8917b8dc2c8aabb154abcec2f3feebce8ea91bdf932979fdc. 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/GBSMU3950943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a0387dcb68f0ea05a883072a676e3149b7decfd4e1a84bb54c584762ec66bf. 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/QZDA81889524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d1f352ec227bcd26cdda62ab2b7ca2e894fb6f0376d5b2c8a66444a68f5400. 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/QZK6P1997612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622be036576d2f4dc28b830e9c01fa9842c417ccd61b05aeaec9ab1a10d3bdff. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:46:33Z), 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/QZK6P1997614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40837a452c126b59d90b1d69f36ce6f733ff5994b6d8d3029fbf4268855b3446. 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/QZK6P1997617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4987295326dec86ed0691c972677ce3a94e981e3a776442fd3584307b13bff. 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/QZHNC2044223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd186a0adcfd639f0eff90eb94f7e76d418e510d72d6e9010427950991785fc3. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:51:46Z), 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/QZHN92080140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd108912030c62db50da89478996c91d437e190010cf74c9c7c6b7f10dadff93d. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZK6Q2150595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48e9fa0d2a8db26d48274e4c9d7e977114d2545e839e5646699ad41fed8a5a5. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:07:57Z), 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/QZK6F2206654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a01f3a91dd5943224249c78c7e2f6bdd0c6ec9c36f28b0711932468ea93b40. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/AUBEC2415039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43a0e7071a2a61dd7dd87837fe20b6de92b23de5f7501adcb09531a586c03f4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM24S1916939.