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 0xd64a110535e63de55bf897da35ebbf0014c3d3764a36eaba8c8b755a71d062de. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/02f335f3-76b9-4620-99a8-087f9f7973bf.json and https://artists.proofprofile.net/proofs/artist/02f335f3-76b9-4620-99a8-087f9f7973bf.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 0x7c8087f9ac294307e62193502e88d8f0ebce96a9d5fea4a064ed47a0514c5492. 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/CAONR2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c84347c26f8423516f3e75f381a314194fafa18d76a5e73160a863d62dcbca. 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/CAONR2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5749edf66cf59492686d5dd7f861a3f3360bf4bf1fc86a2f7713f6e5f5cff031. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/CAONR2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1173bbd3fdff8169ddf8f295d141f55a54f640565362fd8481b9dd92e8e78e. 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/CAONR2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bd0c52b38f0bfa7345900b69a71f4fa7e82dfc89b396224922405797a9c303. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/CAONR2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5681bcb5e02128b4f39d11a649d71a753dfaad9dbb6fd2f82535f03aeae8911c. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/CAONR2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6d5b3e1f838a37f29ec97a47cd4f63824fb45bd9eb87c8071bdbd2ef49a270. 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/CAONR2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944513b0d70ceac62ef5e93ecc289d8adc950c29c8fab7211db837ba0f38081e. 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/CAONR2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1176042dc5cb8d2e3cb7325362cf04f13cfc0b34d6e9255c5a9b588439ed5f4d. 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/CAONR2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0f8f2594015c3e5350e9333f304995488871e072859b1d334606fcb2fa4e8a. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/CAONR2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4147df551f78dc7b311fb29d47d398418764a581156380c5e5e6762ca5eb3afc. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/CAONR2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f12100e7e0f7c0970e018b65a734aa004fffc11ac59865befc56468254a2cd. 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/CAONR2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c84347c26f8423516f3e75f381a314194fafa18d76a5e73160a863d62dcbca. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/CAONR2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1176042dc5cb8d2e3cb7325362cf04f13cfc0b34d6e9255c5a9b588439ed5f4d. 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/CAONR2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0433f9b07483f83ab46275508f49bba50055d78440209af14881716a096ac92e. 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/CAONR2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1173bbd3fdff8169ddf8f295d141f55a54f640565362fd8481b9dd92e8e78e. 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/CAONR2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3236f251c590cdd54d52b7ea7cb5886a1e480724ed4eb7c6c4d2bb0f17adbba. 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/CAONR2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114d1eec02de62569f976efa7c9888b79c4e6c537e39877d3ac81f9eccdffcf8. 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/CAONR2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6731a6dc6dfc1303f8d19dd818895568d53034c030f313097c4f459c08e09810. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CAONR2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11fbbbb369817e78a6c32a320f3b93763adbe259a1af143281421aa2ee2fcdb. 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/CAONR2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480b40340438aa32c6deb668af371c43e582b4340386ec38c81d244828b16fcc. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/CAONR2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4d1f37f9bd485d65d33dbbb4eff2320ee5e6041a0fdd4ada9438bf6d9b7032. 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/CAONR2100006.