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 0x13d2dd276f8d11986374304c2aa70e241b6f889dac6449ca93a88c53c09c772b. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a22ef75f-c532-4c7e-b241-3dbbe0352a55.json and https://artists.proofprofile.net/proofs/artist/a22ef75f-c532-4c7e-b241-3dbbe0352a55.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 0x0a3502f96fe203252ac3cd990e26a2e1a09f2d355580a4345580daa6a5b34416. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:59:37Z), 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/QZK6Q2553427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebec1e20a7671eb23b5a491caf9a875f03cb2951aae49b350566198eb93d6fe0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6Q2555254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777c97bbe72d90b76eeba67151a038fcd78a952f3dd46aa5a8abf97ff5f2f216. 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/TCAJL2513211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5d7f2a2dc2424023e280f109700314fc7472f11a3d41118b2d236c2baab214. 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/TCAJL2513235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863f16dd86849fc9eada1212e45808a935674e7ab05671e17b1f36b1c6fa74c9. 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/TCAJL2513313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade5716b066b07b1f1a78ff0e545be377f52bb20f104194fc7f2a17adfaaf1a4. 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/TCAJL2513262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34d9adf065c9fb31b06a37b6559a1ab0390bd80746b9fa645cbc7a072ae588e. 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/TCAJL2513285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d63304fe5443529754223a7c95c4fd5642c03096b6e5f5c3f4bc9498ee52b6. 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/TCAJL2513330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd80b60e25b5d88a68257d207127c64425a32121f75c6dc5bf422f145b69736. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZVEM2546876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da0aac35b270602a3f978abe49c4118b9690732e761c289f47c10f5754e73a3. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:45:43Z), 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/QZK6Q2563561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc5acfe8fa664f4976f15d544751bb9530ec6b223de328cc6d80126a7c80cc0. 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/QZK6P2530801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce6f39dfbfbefaa48fe6e0ee3eccd96c9be7102531ef60039f4bdf684989d43. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZK6P2531143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe405dd35ee3ea8604c8034b44ae30041570402ebf64477c2306f9f368bb067b. 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/TCAJL2550594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a690999962f4e498e08e9f6e3a1c125b6c957e1d9b94c7c6d38ea27dce84e66. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCAJL2550631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579b59b5ce2941723d8cebb8130afa8e76d5a3fdec1df69fe4da9147ffdbbbd0. 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/TCAJL2550563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f10671bf4d50c262e4f21dea68f639e6c31ad05d88313d3daf4558f1d658f1b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAJL2550526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0bb4c6fceb85ca1b2b2f4b7983610795f6c94de02f1b0c3f7fce5ab271b624. 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/TCAJL2550375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafcd9c7147b93993c197fd51f3f84f40d2691e8398d1f080bed50278b4515c49. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:53:16Z), 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/TCAJL2550481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0139ceddfa94b1d2c3fffbdcd847ab4cd9ad64c1f62424fc3309c8c5d82fd201. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:10:00Z), 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/QZK6P2577805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd698435bcef68752f35555c432231975971a911824265fe2d903d3809732d1b3. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZK6P2579803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aff7f3c461380a85bfe4b13a8dee2adc16c874a6f38094930cbc843b32d7b0b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6N2521441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aba46c248d27945f46c4de8d78410e6860672d9d9652b39ea335d836595ee7f. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCAJL2576895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3816637c7558cea0c677531aac46f6fbe9a3bb348e7efac5ffab0c0670812b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:51:17Z), 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/TCAJL2576917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea5907866d86254b8e4e23f64d5a7208dcd7d10d3194f3d6c57106736f68709. 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/TCAJM2577295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e98b216f72c081f41bcfb535c61a136a3c3d5be0a27d14ad9f3f75f422ffb5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAJL2577265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36cc9de8c53022370cbb2c6a8965c4079dceccda9576c141c7857f67e1345bf1. 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/TCAJM2577214.