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 0xaf2758d0add03efd327674b1dd09d68bc594dca7a7d5d81dc5ce7710b1c27dd4. 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/763980e4-a34f-46d6-829c-eec13ad6bc54.json and https://artists.proofprofile.net/proofs/artist/763980e4-a34f-46d6-829c-eec13ad6bc54.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 0xb99e574295b32c981807bf1e153d646aa0693c31e397e27260ea4c0e61a2b2b0. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QM4TX2491480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17db5ab0b9ffe86ae1b152caedda5487a6ec4b0e9015e62819e21b7fd7d751a. 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/QM6N22422765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99e574295b32c981807bf1e153d646aa0693c31e397e27260ea4c0e61a2b2b0. 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/QM4TX2491480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2610926da0b4352706695845a94f455e00a8f529e599564e667f4889a336ddc8. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QM6N22422767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476a63b4e1f51eebbe1b1a242a67b1c7dbd6ee59130b7e174bc9598e8b4ff935. 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/QM6N22422778.
It Doesn't Matter (Mr Sonic Dance Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3ed2f68ceeef5194ef1fcad46b503db90631d42052ec2c938bc08eb72f193c. 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/QZ3RY2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b96633026fc8a65983220cf5022dc79e6562976b15dab739c5495545d736fc2. 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/QZ3RY2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57fec413d249a692c7f00bd7a65eb2ffc9a1f5665bbc37be8a16605854c415d. 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/QZ3RY2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfb57417e0e9e49c0e3ad67d91fbe4b119d19b3adfa002f564a91ebd991b068. 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/QZ3RY2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b80b8eb8197ffd2fd98b7440ff3953162d75922e17a1723a78925f6fc94e492. 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/QZ3RY2200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756d922e2189f67aa568026b0c81f4f778963943250015557e5509f3bb62ed49. 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/QZ3RY2200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ff559d14087bd4a9337772477f6cd94202b6a05cd66566fb60bbd8878941ac. 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/QZ3RY2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7546202daff7d83a8451a36ebfc8bfc3fee7e3eb499cb60d9d063c4d581e42fa. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZ3RY2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ff559d14087bd4a9337772477f6cd94202b6a05cd66566fb60bbd8878941ac. 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/QZ3RY2300005.