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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96a2b3523761e94d3bc8900d7a0bf5e8d5c19b1abcddb158ca8e09ddb92b389. 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/cf7ff7e7-c55e-4a20-a443-e82fb20e76db.json and https://artists.proofprofile.net/proofs/artist/cf7ff7e7-c55e-4a20-a443-e82fb20e76db.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2b2aadd090ab600da3369d0eac63b6567f7f39acbc4b6857e7321a1ecc8c03. 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/DEG931912684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad47db359ba3e1b780653be2cb8608bed4bad89dacc0fdba3120566da96841b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEG931912824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c5605724678b6184875e7227777bfc9b5caf8cb2f00d35f80ec9c734d3a618. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEG931912825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a121589c92d141f4982d5c4ab11cb97adadfb747eb6af4a3eea2aa1c13d15f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEG931912826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2309cb152d69bf8686336c19c02a79cb9e096eaad10d2aae90ea1a919c49f9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEG931912827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a2347dc73911f428ad4d153e8059f885b2ed1c183e6eed17e5e839d2126b4a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEG931912828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4996bb932d12c8ce9c1c4d8e4ea7c80a1d0d5a8f32d047ad93acbf9d8ca680a2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEG931912829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef64c1c9dac6f43f9e24473ee0b23f200f2466ee686478a5c5bc620173d9161e. 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/DEG931912830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbbbcfc727020203bc3e3603b9c92c667510a781126c3784fdddd58f0b5ef29. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEG931912831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a095abe11f1d1d6084b719002efec5eb4a367ed966f9a5a57fd168e6e3853d1. 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/DEG931912832.
Opera (Dobrawa Czocher & Hannes Kretzer Collaborative Rework)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49dab763daf44d6b77c76a92843b3027cd6776c54c65440c4943a8b98233b36. 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/DEG932101176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd1ee335155b5954bfb67bbe12b36b8a958cd81f551c8f3c298463121dc40cd. 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/DEG932004136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb220f169f23d9950c9c12c6301e7dcd445d4a8875b1e071366a8803d062395f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEG932002915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4996bb932d12c8ce9c1c4d8e4ea7c80a1d0d5a8f32d047ad93acbf9d8ca680a2. 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/DEG931912829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a121589c92d141f4982d5c4ab11cb97adadfb747eb6af4a3eea2aa1c13d15f. 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/DEG931912826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2b2aadd090ab600da3369d0eac63b6567f7f39acbc4b6857e7321a1ecc8c03. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEG931912684.