Raffaello Sanzio da Urbino (; March 28 or April 6, 1483April 6, 1520),Jones and Penny, and 246. now generally known in English as Raphael ( , ),From the Latin and ultimately from biblical Hebrew. w
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 0x3b5940f89db53ada8e995591211e75479c92ef908b20475c0a2962ba5d722752. 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/d9c107dd-410d-4e2b-bbea-705f0734f225.json and https://artists.proofprofile.net/proofs/artist/d9c107dd-410d-4e2b-bbea-705f0734f225.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 0xd8233e2ca6a2d1d1d247de857fa84182a1435c2f08a1a4f559723cfbe8d489c8. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZTB22253993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb15d143fda9a63b61268479b27939c726ab99ef254e0da85aae20831e76ae6. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/QZHN82279275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74a0009a1d634375ffb7e75b1a7d8fa11697550d80b0fa9d4f1fbed8db3b8bd. 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/QZMEM2255051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2438a71ccfc45b9fa4cb35bc71f899d5084a0be2f11b583c55f47f35ec91b2d1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWY2214930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb7b6bac6757452fc2499a5b93ffd3dc1a3aaa17a7cc2fb7960ae4c4241adab. 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/QZMEP2211445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78c4424c770a0894f48f2dff03c421430c15768e250a027179398fc2c5bdc26. 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/DGA092347891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c23d2505d0d77e7183cac41f510faaba9902b7e86ee15cc52120f9c98c68fb0. 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/SKCL32400109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6edc6d08a8fc7c26a8fbf383bfe654c6d905039f147e4d7e745f001c81df2e. 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/CZUM72400190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc85270176030463a400109f2ad660516f4f622696e609e60c36fee30c9f36b1. 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/QZN882119657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ad4827e2dae949fcbf2b0c99fc8ccf39f5ee8a81ea810db9cb7bfad0f55a58. 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/SKP592400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb276611be0e4efa83720ccf5d4da7b5e5dde1de4b06b46ab5a20a92763afc9e5. 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/CZUM72400408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77964f1ca45761ab4a7f44142e7d96ae6e4f1aa924b0d285f67852deac7a2673. 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/CZUM72200630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42edbc23d4fa2fded94d2b18f19c1482bc3f80d5177ea5a41514efd1690d28c1. 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/CZUM72200523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14259b1017409a1e5a931584f9ce37eefb3d721d51f222a466d97a4c67180ba6. 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/CZUM72400396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe1b7d2e712ad4827c220979334d25f17da46f35ccb01766bcdbdc605535edf. 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/CZUM72400401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b2562fa7b2a4409efc22a3da07fda07d058b863bc686756a4734701c6c42d0. 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/QZZ662438062.