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 0x08bb77af9a2db4ad4768a9e770a5ebfd922d6f6d01cb008b42f3d7feb1c067b9. 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/bc399eb3-9d42-4316-aac7-8f6a14f0d8c0.json and https://artists.proofprofile.net/proofs/artist/bc399eb3-9d42-4316-aac7-8f6a14f0d8c0.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 0xf40da51290d16f1c2e714ad17c33e6e9477bfa4a658cbe6565e098923b90ed4d. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/ATV112300657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d508f43946c96ffaf129d6cde64963d9a9a71e96f3a1d117f7f0362c9677fe3. 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/ATV112501099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1da24086535b3c0d191e6fd81e06add900df3cd1aa131ed9830a7e8b163b12d. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/ATV110461001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a5417bdae14149e062825411d2c510c8b2662b8440d89bfb0c03c0c0000b7b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ATV110462003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de826d8e8d8950c5573eb7bd3358e6b6d956fdb6e0563fcb4bc223163394410. 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/ATV110461003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21318e9a82c42e7cf9295addfba0f831504ccd1ce687a58eabec727143ff8493. 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/ATV110462005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1226aa951a6449c0868822f493670336dcde0e1b28123e958f59196dafe6b3. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/ATT251303840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af33d10fc66f9285ca2e2482ae599805b762e1ed65c8473098b6de77cf696dd. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ATT251507360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdcf228a6cec6056767c7ef5045202a6a8df0576951838feecbcf03f6b2cc8e. 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/ATT251507390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa201db12c4f7acc9390f1e5a0cf55d1fa238cbb3673751576a9a4fdce4081a19. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/ATT251507440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6270112fb4cfc8b81931824c7ad6770cbb9c345133b26d87ceaf9749bbe70383. 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/ATT252007740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032095c70c39a3d44af1673b566b9d9e7bc10b2e5af43e792d43cee8aa4bc6e4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/ATT252007760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c6359d7483a6f81b9eaf60955995412d97a6994c5bbc0da227df47cb7b0e3f. 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/ATV112300315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29221af0a5e8522756f1438c8d44cf5174f33d779b82b4f445990ae67ea1f38. 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/ATV112300317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890c1e0a8a8cde9a0a23893e39aa282753f5b6d270013fa435e8e326344d5bec. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/ATV112300329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae76df5f915482d8a2009556038d91e42ea9fa790e3d06fc1ba0c06f96944fe. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/ATV112300620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96bb4bf2455715a208efd15a660142a0a872170eebe8a2313fc68cc63ea783ec. 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/ATV112300622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c32b79b5c7e82152b9d66af6a952c4078fd85ea8185f3702367ee6fac1d84d. 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/ATV112300624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebac7b212df7b1a5bafab49f862e3a8ae448b45869dd7169226b65f37327131. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/ATV112300626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d44fed9d705486a87609d86ecf32bda79b671cabd9fa119be10523228b20ff. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/ATV112300627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc9b69b7a8b136fae2a784a34951899d877cdd533c023d1b548f479233c40c9. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/ATV112300633.