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 0xcef2b9424035c67d91a4540da1ebc6afefb264cec5c5eafe17be858faa7f21de. 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/fe94151d-22e5-445a-bf81-4bd4ac2d6956.json and https://artists.proofprofile.net/proofs/artist/fe94151d-22e5-445a-bf81-4bd4ac2d6956.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 0xdee2037c0e095bb2c38cd95cab15838775c6c4f714e44361ee1f0ce64bbfadc9. 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/QZWFK2316653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e46025204eb3100600c4e44d4b5a950afb5ce9f3d0fb9907ae7b2e3aa450f7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHN42152536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d32aacf95d82ff2739def9b7475f19d0572138a65b7018fda4f7ea517be0dff. 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/QZHN42152537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad77b2a88f26ae5fab7d81735f367a6b1d32edcef3b9c14b9ff3acbc6742f410. 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/QZHN42152538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6301bc4d8e5736f98e58da143735cfaa6e0ef708febf430167a3cdff6df1db8f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHN42152539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9284c12535101cc8c289071aae4f322d7b205ef4bd7d42d0ccb0b1ac5b8d1eb2. 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/QZHN42152540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d278704adf0921470eb9fd92bfb1735924e981753f1fc778e82bf04e756f00e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHN42152541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e72897e1998ddb32a2a2fd54681ea4fdc22e9c5e70fbc9495bbca7b6a1b26e. 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/QZHN42152542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442b821d6406e4e5505b2f8986308c0bf80e30397a1a0d82af941c9b7d2ddb3b. 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/QZHN42152543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeaa0ecfe102d28469c60abdd499f0f0384e76f28b25b3d630fbd0d53f07ac4e. 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/QZHN42152544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b3be08408de7475c642f5fd99691da4df93b0049380c6920bf70bc5b3dcca3. 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/QZCE61820477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3c2019fa4a5d79fe4819082d3a249b45968b4a9b90d02c99d9c123e2975c11. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZB4J1837514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b01b711d4db877432cab063c3ea0dc278d3c06c10877ed5de1e9b430bce9b9b. 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/QZB4J1806018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a12d7dda0e7c53df491083e4e2828b2f7e82a3b16f14cb2fe58f68a16e5405. 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/QZCE61848743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec05b130d13a853282946dcfd02ad21e113823e05b024878baf00689ba88232. 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/QZNWX2410449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d51c3cdc15e583b409c3e5b60772fd2a2c84e173ca35e52ff47b08909e2ef5. 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/QZMEN2457295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ec3d418b4359a990448c41fd1ddfb21e8a114e96789e1d04276e1b5fa65767. 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/UKW3Z2400781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc272b741a9c640fe562457a87e1adb5f05dd9f24643f9fc65ba674fd4863be61. 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/QZES52470833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481697d6a554098e06c32d20dc3343b4dafa0a8f7d351e7d72d9ea1a78b4662f. 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/QZK6M2358256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92528792f24d109a6028acf36e6d4bb0c8092d7f9154bea6aac5778326e26d9d. 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/QZMER2223655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb081f53e7215287c603a026112ae082629575772bf1c5eb952efed5a07f61f0. 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/QZK6N2277003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ace3bc837865dff60cf3c70ddabedc89cfdb0cff9fcf21adf0b0e02544f90e6. 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/QZHN32274437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad1fb92271fd4644864d39877a3ce84131635f98f23a4c3d6aae01b1cfe18ee. 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/QZDA72219320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1d80b4bb2917cf048fca943d5e5f99d54229b9f0501c29295a25451684e5f8. 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/QZFZ22285517.