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 0x41ab6f83151fd6e841c1283672735767a56634c7faf8ae33b09aad11151e9766. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e6f3c721-ee18-4851-b401-9897d400ff0f.json and https://artists.proofprofile.net/proofs/artist/e6f3c721-ee18-4851-b401-9897d400ff0f.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 0x31a0c001da5278a5c04218aab8abe93b87a9564f3773862b7433f63599c0e067. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/SE6XY2500747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a823c852665d5677b2ebcce1e587e66bf2154f7a80611dc3fb38dcf2c6976b. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/SE6XY2500751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f0d226371ed55204980fd862a2b94113319fb8621c0bbacadf53e24bf14f95. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/SE6XY2500755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e6b63898d82c29268c383b34f30115fef185506a42ebc62b11f4fc2eb31a72. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/SE6XY2500757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90a9de6225d5f4e574406850f105e0f17d6c6d350356db925ce73bb614ce119. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/SE6XY2500761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f5b64170ffb4bff5d0c7d92347c99766e59cb4054093cd94d0f8020a028201. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/SE6XY2500748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6228548b69ae328e07b368b6dfab12ddb73e1f03d431e0ba35d6ae411569bf. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/SE6XY2500749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9599b09b22e1ed44e2735d4eaac7724b68c224d47d6f338f0bb4bab78bad20f. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/SE6XY2500750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a823c852665d5677b2ebcce1e587e66bf2154f7a80611dc3fb38dcf2c6976b. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/SE6XY2500751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc72a4295deccc6ef13dd82d2038324095621e0d127b68e38c0a4a1aae2c350. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/SE6XY2500753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9192212ce4fbf1bfcdeb3be0e960cc63c3997ed9b394aa88c2fd2af149a79b7c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE6XY2500754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e6b63898d82c29268c383b34f30115fef185506a42ebc62b11f4fc2eb31a72. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/SE6XY2500757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cab259035e210baeaa0f8126f286283affc5a6a9a5aee4d07408c26d1c42cf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE6XY2500758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6335381cdf446daf2e356a8161d3113f9f61d974232676bb3ef2bd838494e3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE6XY2500760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90a9de6225d5f4e574406850f105e0f17d6c6d350356db925ce73bb614ce119. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/SE6XY2500761.