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 0xb2c08e5f4c2eedab94da639ca19a2cedaae16cef580d46f3082e7a63247563a3. 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/20a77f47-9047-4f1a-9e42-47047d41293c.json and https://artists.proofprofile.net/proofs/artist/20a77f47-9047-4f1a-9e42-47047d41293c.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 0xaa09c5eee0bec414a668e5889357d5ac0fc69891b352fa23f9b3706f24281f64. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/AEA0Q2467314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913adea030f4cb1f3c29da8ffbe3fb032e84a3595bb1cb0d072fda187db9d1b6. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/AEA0Q2452562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe531e4c179d811be3d6db96bdc46e3abd99b46e249f524793b711c98e7e7d355. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/AEA0Q2452564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074ab73756854b63647960dba35a1a663699bdd5f72bbb6cba1391274043a92a. 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/AEA2W2508474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd319d23821dc630ed90079d43f14edecd86a0b3e7fe42b486d5be79be835e9d3. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/AEA0Q2483709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff35c53470156aba69aab2f409fc8e5d1146b30fb8680235cb12c91cebbf781b. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/AEA0Q2483710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8298e9a9828dd6ddb62c697d5dabc9626ae80d7c8aee2ae870ca8034ec89a6cd. 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/AEA2W2516430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f4c3ae46d68cfd21e9ea579ad1a8572f973f77c3744c79a67fd8469d78675c. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/AEA2W2504222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f4d1d91661d19be63fc3324997c8906086ffbc2d91c1bdb8e2c30a850e984a. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/USCGJ2599722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb383be1be47649ae4ba999cf860c366f0c7b0211e858686c7453cb9bbe6a15e2. 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/USCGJ2599723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b2dd298b347d1a5a4a33eccd42f452212ad0428e33184cdecdb2a725c10308. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/USCGJ2599724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764736397d68072ff084e26652a38738a2e10b18111266023bfaa739e98cec57. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USCGJ2599725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffb82efd648220dc17044cb2b8c0fde41b9702a8e071fb8e096b976886618b0. 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/USCGJ2599726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd058f138439b0fcfddd200e3085113e9e0a3244a6d9590573d81e4bc19684e8c. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/USCGJ2599729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4e6dfb64ed7abd66600f5d0eda8972ad523a447b73c39bffe9ed746a91d0f6. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/USCGJ2599731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52df140eb1ae950a9dd0671af05f50c9d7e124a70cc524648a897a688fb464e6. 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/USCGJ2599732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4bf902af9b48e631ba638d720f2cc821b2d84a38a87a1d685cf8c129eafa4b. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USCGJ2599737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7213b9987adcb9d6ac86f1db0c1d53035ad9d52a2451c860e4db3af67357bc9e. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/USCGJ2599739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dad9438162a5866a266f44df857f85d07f6beaa0123a404202cbf9ad4396045. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/USCGJ2599743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc368412e85243d04de2262e4a457fb0b924677b387ff351cedb7939d876c2f7. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/USCGJ2599747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de1422318ef1a3c8a405845538d262526817df93b3d090418edf56a65449e5f. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USCGJ2599749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba4c3685ca6e4026f2fcee468c21c11f7452578368c2cc2f56cf8bb8deaee2e. 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/USCGJ2599753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74aae10b7706214ffce77318ac113a8e083b427abf5c856a3298865c5f373cd. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/USCGJ2599754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e9201cf4ad76a47c3a6ffd9e5eb28aee59375593b522a1e0d0260f35554878. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USCGJ2599755.