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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 0xdffffb14bee0f9b33907b6ff6579992f9e490659cb714ea266067f21475da7cd. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a10b25de-2a92-4ffd-b356-679ad9f5d5b8.json and https://artists.proofprofile.net/proofs/artist/a10b25de-2a92-4ffd-b356-679ad9f5d5b8.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 0x0aa5870ef3387be4783a7b03021e05e648c70e3045efe1be2245ab1224ccd5a1. 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/IT0501601989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a810fdc851ceafc553a5a6f51027937e3a9fb36944dc1f6f1a9cde924b85d00. 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/IT0501601990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d4a86444c6ff6c4423ffcfa9c957adb476076276b01f2b77925e0c1fca325f. 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/IT0501601991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6cc248ba340c71590e76e3797320c66531032cf89b5817df104a2520bb37da. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/IT0501601992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd92350d85e428254739bd42a72258141eb0db79d41bb079309101432cc7cb47. 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/IT0501601993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152a9e9b5e9ac470d915948562e186f5d09d1f6cd4f07a3bafa75f02beac5522. 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/IT0501601994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d77c7532ee59f4f67791a46eabb9da31a632c14c197cb7370ff516eb7cb8c5f. 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/IT0501601995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055329913843d2e2df904557f0641678ac7504925235a6a3e2de196f4c1f3c6c. 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/IT0501601996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ecf113e4142abaff2e1c6e95d23b0f4b0e45453a133f54680369f7eaec03b63. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QM6N21433902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0dd65f95f9b8e4a425801acac5724365e77537ea420550036e8e62ad92fec6f. 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/QM6N21433903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85472d9a23799b9e1d389678351d7821dc2e730a1f8647ecd3832e888110e585. 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/QM6N21433904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4925441cae7fd8091b11501974669fb524193066916de15a7330137ad008ebda. 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/QM6N21433905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598ad16629056336cdeb4e0478839129a83bc0c6c7fcdbfc683a2a51369ac60d. 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/QM6N21433906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e68b430a77ae0ac61820868f0305420ec17388e7e509ad496659db06948896. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QM6N21433907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9467046f253f92962b277695e4573c9a18ccdbd4a1411ad8446ac9096a0ca371. 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/QM6N21433908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf883ce3de74f2a17788e311fdc2e8f95c3a88d078e12d4d0a4d486c385f9ae. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QM6N21433909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2dd447b4e70cd49f99401a9376263a02c6382456599513c7dbd3f63f65d1fc. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QM6N21433910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3cdd5c00bfcdb907b4c4c4c7e246365fe35ea4856f81e30584ed28fce461cd. 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/QM6N21433911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b5688e5b57e4db95e2d2e75d85b534c02610e421a0e8d1d9745482dd485fdc. 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/QM6N21433912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ab7743f72ef51408e3aa017e1e234f14de25c164d2eb63851bef5b44d73672. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ITP842400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafcb375a92d97a86e37a3b5acc4f77c94ba231ca947118aa6c2a600817b21983. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6N21432263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3f2af47e47cef248165bd8bf90f06a308bf5d5858e654a55df461410a8d6b6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6N21432264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d9c5a606b9cf011b5a8ad85635394a143b41748ad24bb5d9d12dccc851cd0d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6N21432265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2b4d3d14367bc6a34a6d312cc667381d799fa0cc42370abbd729e6aefe2c6f. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QM6N21432266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2278cecd370c2919ece5ca97b8c3d1877ef4a5c1404feb44de9ef41775ce8aaa. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QM6N21432077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cfd2e158692339b51886f61d04b0767a79e524fbf24a4d5bdda7ee3ad618a51. 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/QM6N21432078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ef467fc081241f58b23181dba566962e26ba74ef20bc61ce6b5a83766464ee. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/QM6N21432079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef93093f2e1dbca6cdd4a6b879f1cab3253f985e4dd10ed6f60a10c5c20cdb4. 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/QM6N21432080.