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 0x64d3c0c4eaf75a9e0b9b20351a92f14a8342aaab0527e936e55d0b2775c279fa. 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/e569cda1-637b-46b9-b595-7f06b0677218.json and https://artists.proofprofile.net/proofs/artist/e569cda1-637b-46b9-b595-7f06b0677218.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 0x8bbeb57e6016ae992d30196e305b17e3076db88d2607bd2cf0cffccd6a461254. 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/QZK6Q1924136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2410af0d467d1ecd8dbc69d61bfc949e212e8b3c9ad8897cda0ddf97de735b66. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZK6Q1924137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6823fa2b859fda9f1d1d127bfd32b0f0a0e8b09129453d9e032fa2f4a256d3da. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZK6Q1924142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38f80097e5afb181204afcc2c404990a6de069df858d48362f50fcfbe1754fd. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/QZK6Q1924143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca7fd886e93e708bb33b75041f6011774d5fe2492b443d657af4b3111f1be54. 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/QZK6Q1924144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b137c6691f62e76b135773ed083873b8259af23a90d3154f78eae28854624d. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZK6Q1924145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2afe5621ee63857fee84295ed14563634eff4a6fa118206066579f98d57416e. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZK6Q1924146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ec3d40a47268504301982e0fc2e75159346a633e7495b6b696380a5d88462f. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZTBC2342307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af16b9a8fc4df6c1d076fe4d7960d05ac20753416012931ee3682f294073f1c. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZTBC2342310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c9ce32721dacc738f4fdd3a3c83692d95e8927015e760deae1b32a946330c7. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZTBC2342311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc27e562b67fe9f2c54391dfe80a7b9ed238848e66de0aa808f8dcbad1d421ba. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZTBC2342316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44eec9803a8cbd66b48f0ea7ed6dada95c23053bf38d6033b3ddaff3b000acf. 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/QZTBC2342317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa552303c1a9bab29ccecdea582136002fab803545fe36aa2d69067c7a7f31f39. 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/QZTBC2342318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba8699c111fa6e7e56b5c89065d17a27c76cec17365cb8a49301ff31e746c73. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZTBC2342319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd923881be2368a99b66df3b8829c3ba317b009b5ca091af7ef56175f5bc8a084. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZTBC2336880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400a02ae774aff97563c57e5969faf11276d52e765b1494f8193688a94f7035e. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZTBC2336885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5ae38ad5de5a7219de7f5814a1d19eb987e07a00c3d16be8a209f0a334260b. 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/QZTBC2339760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd971193c72de60edc36ced1082e978eeb64ec88c8a555dba9f5633aa0c7855a. 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/QZTBC2339761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabeb6697e371705ab3d30f2c50c3012eeb0857d6fe010641fe6477bbbb5a8db8. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/QZTBC2339763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4abf2372d036d30e057aa4433489045dc61ab3fcabe0fd0d1fb123c6768da6. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZTBC2339765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37663a8e4725534856864036113d4025e2d07abaf51bfd3620af7ae5a457587. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTBD2323434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121cf07167fd3202c1b3356655a639308e476e572612b67315bdc1b6407bdca8. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZTBD2323436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340271900936e852dc887ec1d689d80bd68be66f9b8cc8ff10068588975f0115. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZTBD2323440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941af109c167aa285916c07c9f2f2c6ded24459efdb52749d3cb5f16afce0430. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZTBD2323444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5801ad66b3989620729cd1baf0cd66c4355fbd2a311421b603c48ed2804cbcd9. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTBE2336347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202aa089feff4bad504962d85409c847b5a2b10f8d72826513025f740d2e9b5e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZK6N2465696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3339d3cb0b9119196d9db7706722ba4021e543118ab351fa672fba4877b1d6. 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/QZK6M2403626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f984474824c8bcff2c9a4a13346496a3cda601df75a4e8efd48256404f3a2a. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZK6M2403627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63fc45dc1e6b101400f83927d2dc1642e327b36b0d8c1f4c5b4db9633bffe19. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QT3EX2555473.