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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 0xd52710cadd3b6a56d6adcfbec4743f98ce9968b83ed32c41a5cdb1e70553014d. 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/20acc394-cb2e-4dda-a626-85abd9556592.json and https://artists.proofprofile.net/proofs/artist/20acc394-cb2e-4dda-a626-85abd9556592.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 0xf0513d9e6f44b76b8d6d046f614e15c44b71eb82aedcda9cf74c108df9578906. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/SEYOK1809682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6bf13cddd009f634e570df0a4e8ae14a67dab05459738fa7461d08e4e17e9d. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAEF1970003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2f2bee8b7661c43ac7cb453284688841d47581f8830754ea826abb9ac75a9d. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/TCAEF1970005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745ffcbe53721f4ef5f39e71fec332d0ac4432b110ca3fd114dfe2ddc1207845. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAEF1970007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa769938d11f63f4a535f7c25d7c7aa5e06b051944aaf25fa761f329138cdd9e9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAEF1970008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a5cd838f4c0ac89c8a97d757b108ac44c52efba9beeddc34e91c01cc4d70f3. 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/TCAEF1970009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fbb94b667643f228f923e9c3618ecf0709a1508a806951ad509bc3bd7d8f78. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/TCAEF1970010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff36f806bc554221342cc280b001097af9357999f1db10b7f67bfeb83208deb4. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/TCAEF1970012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640883f77993ed3307f0ddc0ae790047c4f0fa0bc59cf1c523431bcdf4a2688c. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/TCAEF1970013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b7aee460f76522dc01a1be6bc3c638b91afe63d805fba49e93822ff4566fde. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/TCAEF1970014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c8693b989c17c1eb511a8ad4a1205f929c93c6b074a199bacd561cfb9434e3. Chain 2 (Bitcoin): anchored in block 958731 (2026-07-19T12:35:36Z), 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/TCAEF1970015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e74ef17c76a5e78cc7222559e15b0e3f1b2a9d10536b6dbeb9eed5c84937373. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCAEF1970016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b73912fea3b03412e9bd924a0fac3ea4409b37949185d8715661ae054189b85. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAEF1969946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeedd08576639d9c116df3b86070e89290f78742e930164be4fcaa70d9928daea. 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/TCAEF1969954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffce165f73f468b81730ea273810df44e640a403fdc4c3ff4199cb3c05054ad. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/TCAEF1969958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe6a93548b4de8b4a11df609ddac26193e1ad62853e8554b73778d019741942. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/TCAEF1969959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c13f99c3a28172d13b6e2c4d698912bfd25daaffd592f24f7e2ffc252990d7. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/TCAEF1969961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebae2b074e35574ec6df4e479e2780b31e58a796c2ba0ada35f873af2b5dbc24. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/TCAEF1969964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc1b95af9e1edb58da6c8a7ba581327b3d783dead42b7077f1a146077d60d76. 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/TCAEF1969965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58a2efee8cb4570a644accf3296ee6d11dc1b8bf8b8c912d708232c30342cfc. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAEF1969967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0bfc591d809fe30b032a0aa669f20f3a70b5d454e9f36a509535fce7487233. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCAEF1969970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94b3bc5f25206b9ec93b834700a135c074f3f7891dc707a0e9823f53ce6bf10. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCADH1735459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c151516dc9c90b924cce9d6cbd9ba8009d0e7898f65235333cb5735ff06f6d7. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TCADH1735460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a29c9d71abed3c1d3071a9df68de0fb620fdb2f16411c25ca1781c979338c9b. 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/TCADH1735502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be689edc861be2e67b6ee9804dd880c1f3aa18edd21b9f7a7eeaea1e89d9408. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/TCADH1735504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323dce260f8d0c38dbcdfc8a9ead7735eea384202e793cd060429a23657ed736. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/TCADH1735510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f767f4bf306752c50c5e079cea3ce2c294ca0c4be33cdb0a810b30be614214. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/TCADH1735511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592c58e7047998bc03d9f4c592890a58d3903d23a8206e0413306f7f25c34d84. 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/MXF820700128.