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 0x7d7450528480f4bd77d94adeeb5afc91b992694ea7bb11851798a151200f8e19. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/acaccf56-a851-4c8a-b6c4-9209a9454fc5.json and https://artists.proofprofile.net/proofs/artist/acaccf56-a851-4c8a-b6c4-9209a9454fc5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xbf82c45c8295782806f42a83960895b1855ed3c6f7ece1642b66683ddbb4e69c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBRKQ2261891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cd70bb12526ce072d33592698a9bfd6140b2dcf3a8b18aff22627008ac4c18. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBRKQ2261904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0423b7f4dd0e2e38202117790956af6b24cccf2d577288fde227d50b340000cb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBRKQ2261923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb6e72601b2f4a9998005e6524aaa1d33eef28f4e3e067742d558a0a35f4f2f. 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/GBRKQ2261930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a6d98adf572658341e794be055d94dad0cdc35e09528d94873d72f9712463f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBRKQ2261931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710e66af9d5bcaae99a75fecd5fc9c19ea5bc01f4a4074c02b1eac1f81e8976d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBRKQ2261940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fa0c7a0e01a1f625bfbede3e2e50d34bfd26cbda7c63cdf848892d23848d93. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBRKQ2261943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28999f36f56d9b568ff3b7a64af2adb4bb9d1ea68d4d27a87bf7fcb52de82f82. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBRKQ2261944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f61f5862821c3ea5f86e59707856bfcac0c86c99aab516b17590cd50fde16e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBRKQ2261945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b630141793bfa9cc6cce057431bd4d1489f70a630bcb5f87bb55aeafab0438. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBRKQ2261947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3909d3cb37541ff6aa4db89bd0d2851024602d8f6736b08b56600ae40c045346. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBRKQ2261948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e3b84850d3fe11ec97fbedc80b8f6e78ef9fd9e4ceafd2957729f845c20e23. 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/GBRKQ2261950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e8356a9bc99d5d033ffabf571b20545525e5825594364cf98c214b7996ae4e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBRKQ2261951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163b93bf6312c99a5a6323babb04cebf63b6062b84c03cb21e784265089ddb45. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBRKQ2261952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9515f5957d1df100f07bd098d98f5b7df6abb04fec5181d770518874fa7893. 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/GBRKQ2261954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af136ac13a5a5eb01ccdef6e32f911118e5642d4c27d994f88e3822689e1562. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBRKQ2261955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c953893875208526b2324dc6336a79458af4ea759f4918c2bf8a85521cada7c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBRKQ2261961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920ee963652e0252b71581615e1574e2e69150341a683dd0626c220d53a22120. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBRKQ2261964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8313c682cd14c7fb388536d62b6d2f79dc919ad9816a30f43f53f8636ab8848b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBRKQ2261965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9c110026baa5d1650e68b22df782444e93ee0968c7fc7ee35adabd1901b4bd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBRKQ2261966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b430df533d273ebd8df4187a21ffdf5a3c2b12fa1eb165dbbbc65dbf4ef267. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:29:49Z), 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/GBRKQ2261939.
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 0xb71c2c60977daf6a50f6b327f8ed58ff2ac67f76274cf8e629a135388915a072. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/GBRKQ2261927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc7a908d857ce555ef64328b7c3fef2fd86fc32e608a8b333c5bf2fe1d7abbb. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBRKQ2261933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c792a03c6ce15b73f5bf2490fdd48f767782ce3f2cfa42c629c6830d7f6aff. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBRKQ2261941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700c1105151c5a7184f80402b255ae8744c913928491a917a2c96e505b95e406. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBRKQ2261953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78fdc4e5329124cbfe24ea0c09234510c5130721ebae84a1894daac33d73ae44. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBRKQ2261956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58f7231eecff1ab65974414b60d912bdb1bb51793f9f46a6b208d4213c79993. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBRKQ2261958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfa2b349b5e32330f467a775a2f0fb2e3ce9f439b8f9ae7c7a72719e5847617. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBRKQ2261960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f85bf311529db206a0611eb206602cccd4073a2c58e4ee577455ea7106b89a9. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/GBRKQ2261963.