Orchestra and Chorus of Teatro dell'Opera di Roma
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 0xdb2a3a7e37ce261f5ee50b0f9c06b04c39ea9c1b7710f994a32c4f471da87406. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/69e2da90-73a8-4090-8b78-8d6563ff4675.json and https://artists.proofprofile.net/proofs/artist/69e2da90-73a8-4090-8b78-8d6563ff4675.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 0x7bca9a83c47aa752bf62bc2871faee61806fb3eed9f4378d8328cd80b5ddea44. 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/USX761302101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f7d2b7667064151265c287388ce1f6797ca2e9fc88cc1e84e3f4f7f14bb29f. 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/USX761302102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6d2ba3bcab8915990d46de0a2e5b593e221c321c622114dd1cbd33f31689a2. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USX761302103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefebcece90de3138b5161d19cb8d4f73163570ae9f3f5cca9f61d03fdcc9f224. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USX761302105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe523db51ec97cf19fe44935111cb02dfd0012de742d6f8ff1831f5c482eefd. 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/USX761302107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbb52b53be2f15107a3cc85c8bbb24a516a0e4cea9dd62be2bd8783fe23379e. 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/USX761302112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13314e4190639181cf7e88618d9eee30e4f9651415299fd012e8bb378f533e30. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USX761302113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce15e535f09e5f9b02b6ebd00512d7891af558ad472b1d2fa9b0f2090e30f573. 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/USX761302114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2708e354dc2ccfb66d8e3dbe63503112e1f311602f9bd8fbd0b5c25430ba6d5a. 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/USX761302115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a76c7c29cc7e81690b92c2fdcf917946ad3b5999ba4f0ff9d6ea5d2152f1ca9. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USX761302116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893f6375ed4edc86037e336fc750560059d4611dcedfbf089bd22f33fbc74e7e. 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/USX761302117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5902376d7c719a3249a6f0d686b42cef7494a14cd008efff1c276c0d55e4077. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USX761302118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9346c7f70304f8ddb89d363283bfc316aa7cfa5f9ec6042b363954d441e3d702. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USX761302119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89114d3ef60eb8279ad9e27bdbd72afe6a18e794a5428d598f00d788c2cf7e66. 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/USX761302120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37b66f91e90aacaec4117ea18e57c3839249918396ad2194ae54d44f6e6f81b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USX761302125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6895e8d0af3a6a672f197deff5c74a36a9a08a53f0400d70cac01842bf97fe2b. 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/USX761302128.