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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 0xa3bae5eea7b7ffa254f887742c8ffca58dab151c08d6e2aee9240c27c6be0d45. 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/9033b42f-350b-4522-837a-75e7ba0ec0a6.json and https://artists.proofprofile.net/proofs/artist/9033b42f-350b-4522-837a-75e7ba0ec0a6.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 0xdf7dfbbc2fec8dae54259013e9a8f17573ff33f5dc0a392e92461c2de1e68b4b. 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/CH6542240257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe961948a4ca7a937ab247424e54c265b58b38147f1512ed401a809cc90b4b4. 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/CH6542240259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0976166114dc781ee8ee3210e6306dc2d5fd1a7c2c4dc83c20321cbe946f4b. 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/CH6542240269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59d9c04e600bc176a5900eeeecf5c14e2e13af1f24c19eeace8604c65a4888e. 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/CH6542240271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f76dbb73f93d9624ad64d6844d555c59adb9612fb707a5b6346d23602a56665. 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/CH6542437288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc792b18175dffdf7626b6d63911cee699fa64499bdf419ec6f6e62ea14fa6e98. 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/CH6542437289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5229c38b4094043038f04feb08fc2b21abf29f8e7f67140ef1e9a2475424ee3. 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/CH6542437290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26accd8fac2c0ca240c57542f9d0f9e83f2511ae57055d9fe4c14bbd9461f0a7. 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/CH6542437291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979a85b4312540a6a72d4311b5192499d86ec326e9ccfef88b6c698229a3be16. 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/CH6542437292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd360bfe03baac0a3069cdddf9aafb84c7ec38b9da9d1147ca8c9680a51c0f4. 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/CH6542437294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd17371a3709fa41b4e275d407bc622b75e5fcfe856180a4d43646c800a6225. 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/CH6542437295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788607b5d874a527f9cb65ca021b3c59c9529d77268176fee0ddd64b5a3e485a. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:53:00Z), 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/CH6542437296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2322637f9578826a22256506ccaeabac1ae90e0ccd5655faf015235bc0db024f. 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/CH6542437297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58d01484932d8723bae3331940cb966a8c7f9e1a65de04e804b6c0531bd0c8e. 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/CH6542437298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd0f1fcb8607e9f8f69dcbf9a88b2248f4640c3934f494fad703cf3ab3f9e47. 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/CH6542437299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0c8b93b96e0fd88ac79b623ae6347ec6449f22e43dc82c7b6806b9a65cebe6. 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/CH6542437301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645cd318b7238f3a20ab92ebd93952158737a146543d2be83ad704a0859aca7d. 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/CH6542437304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4dedb50987bc7e6908ccd1c961ee92a999594514d4fd2813f3c5063abae27f3. 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/CH6542437305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5021d930bc436cdf4a24d0e54cb2f9d790a976f29c298273765c17772184c2ce. 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/CH6542437307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bc34db850fbbf40f8732c8dc328e36c3f5912e4f4d26c1e254bcaa6f723297. 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/CH6542437308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc425200c48adb1caba8f39ea917e2d42d23d4e86a1c83090f2a650f575854e. 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/CH6542440481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d47375293ca06785a5d659cb55b674ddd993486bb4349b5873f1174b5a71b66. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:09:05Z), 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/QZTBB2234258.