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 0xd47005339c50c0ecbb3780889eb8a4259674bf96ba7503f8ca0ed70dd5df05aa. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b796617-6dde-4499-a94b-e46390bac792.json and https://artists.proofprofile.net/proofs/artist/8b796617-6dde-4499-a94b-e46390bac792.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 0xa3b0ac56a19db65f0dc390e56f54bbe58afe2cc78a77e6e4da1d580f1b99549e. 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/QZK6L2450955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f4d965abb66c6ffd45554dcb78cd5d1d6c533f82fb688f0fa1ed1f7775c970. 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/QZNWV2319751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b8e5eae7d1110bbf910386fe76ef82d2712f113c1178e6461acb17a9a30a0f. 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/QZGLM2473877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75eb5db5025b2dac80e980a0068bd3480ef0c32e47ba1bcf4d1f3defaf8662e6. 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/RUA1D2427292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6248f0cb44fd8f9ee49668258085f5dedc55c783e843d5f67f2de5d1864d67. 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/RUA1D2421021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4d52e656e9018b2c337480ff47f351427e89030d5c113d367a451aa90d695f. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/RUA1D2421023.
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 0x4d06e706779cc0adf1dfde503685b505fde2a018ecb339fc15c3e8244178d217. 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/UKZGC2411084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c8879d30a4d037063108e3cf9c699439b64b9b455ae227f08f4aba680dc747. 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/QZTPX2468018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88d2bb156119377a8a2164eddefe19e7cdd0567e81436d2d7db4203a80d3fcf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTVM2433336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0966624e1574b688d529a3810f24fd0cd64f4ec8b66021414e488398f2e336ee. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTPX2425991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0bc9e37eb6ccba75ec4f1c526a13212dacdd9ea78bb4c15d54f75b9f8d777f5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTPX2496426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ac000f82cad7cf100de6a213b6e70bdaaf4b6b34312e1d016af9a54a662bf9. 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/QZTPX2405460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d1fe05fcb3b661fddea4a55b68b9de2c6f4a0fbeac7f1187f4d00a305d79d8. 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/QZNJW2416104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb769e0f5e69417796c7ff72dc5b1089233eb29dcf8717a21cdd921d6095f95f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMEM2413990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5535580be752e2907dbb15177a9dcfba6ad2974861e2bb2080e66c00fea536e3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE6SA2261150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2601424660fa1353f4f1500e5091667d0367cf3b3569b8c7e9357ccee095c962. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM42K2317172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f9c991889df65c19ca08034212b2c51a316d8c1847ce2bb93536318bd4c078. 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/SE6QE2420062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7169ba1207152d1ed74105cdd5cfa4ccabe38c148333b839da272f96020797. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:37:02Z), 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/SE6QE2420059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f9c76fe65b05ed2a0e7d4c5296c78800d0a4f2524cd5b78055a92e887d22bc. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/SE6QE2420061.