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 0x3dd6fe2d75e53d29c092e55d02379c8627be47aa6babb3da79833f30d2dfe65c. 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/70323890-f69b-41b4-8892-e575309b4212.json and https://artists.proofprofile.net/proofs/artist/70323890-f69b-41b4-8892-e575309b4212.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 0xe0d8309e9e92f380c10bae7812865c88c83415801310946e4bbf406215da4906. 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/QZN882203628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1cf7f8d8547be3de8ae3ad299ecaa16a0e49066ebfc580255df864d7345892. 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/USANG2218889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cfba694bd513878c5b2d161274285bfa39073dc43bd7f9728482ee9f5f2b76. 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/USANG2229482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f94ffd29c0b9be39fda4be55f318dd46b22ddfe74f2383faaaba03912feff5b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:01:25Z), 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/USANG2210718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb662da2a78a4b6fa95aa1a7c77f7e1c3ac59abf6e61ef54b216f83b85ba37cd6. 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/UKZGC2300211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951c46e20d31d8cc644459247d49b98dc86755c1d7450a9518e02ca1837659b6. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USANG2262299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211fb8b6ce0329cd13822ce326ef92e7456374c92f8614d46db3ffd43f4dcab0. 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/UKZGC2302200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5de8b17bef309b4584938727a75533281c8d24c6d9a8f9cc51f6b70723b87f. 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/US3DF2427382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5de8b17bef309b4584938727a75533281c8d24c6d9a8f9cc51f6b70723b87f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US3DF2427382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c59f5eeefec0e85817a6f1ee9604aae2577410aa22c4da828cdd574fb1fff3. 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/US3DF2427384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5d339d869029f34b066c879a5647cb9885b69f6fbe7bfb57638943fdf0ae41. 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/US3DF2427385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d5e86fcbf45a53aff7c67840d3c308d2836fae2255a9fb74b1c6bd6d10ec35. 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/US3DF2462871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed958f76191db9e7b39083c44674241fcf39a7e2472575dad7066a2db1a7ac45. 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/USANG2415474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735b84e42c90d308642d959d727f2cbacd86e3153b47c99fd0dd15e4d920d72f. 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/QZZ762410520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd64bda66870df38552f4139e60e9ae4b4dd8d63c1ef8d2f4137b47565b627cc. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/USANG2482999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedad902cd2a7a6a39ce0f8ebb8b787c859c2fa01b4e88cb2967166edcef51bc8. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/USANG2487090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea705aaa1b1a78dbf69174b16d478e497182c3495523fb3a8079adf335bf06ad. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:48:53Z), 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/US3DF2511545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8501b77cc40803d053483b81b669af98ffc538538878ed0b08b6548f52b657e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKZGC2202955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c44bd990debeaaf8d1df615b6c9be1707cc2288c7c21a5d5d3e36fdc9b92877. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFZ32520265.