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 0x490f78933b9a8f5951ecdc0c57657bed90cb46d501d55ccad26d8bcc7b185187. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9fb66ea5-7625-47fa-8b99-18e1831050a3.json and https://artists.proofprofile.net/proofs/artist/9fb66ea5-7625-47fa-8b99-18e1831050a3.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 0xf07f6c29f5873f82450a423bf251f1e74d11b22b747b16885a1efbdbb618db77. 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/CNZ352100532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b9490cc7a5a7e0acbf10a828cb663004fe3748d6c64ae7448858d02a1d00e6. 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/CNZ352100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7c40134864851f45fe64500a281096a30d1370dc9fca2e978aca79259a4231. 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/CNZ352000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7c09194a50216cfbc5429cbf646777f99c80f2693f2c0df23c90a1aaf56c0a. 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/CNZ131300147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac8cab7cde66cb1343eed929dd2162db6a79c5c3b8f94ecf0eaf7cb62403f54. 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/CNZ131300150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc915a913e71738cc3cbed5d2dcec347b82c55c55393b049b7638bd263d297dcb. 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/CNZ131300151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e0a30c2f6d7d5ba6b5bc77321d959419c580c2eb9bff1c8567286e16251161. 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/CNZ131300152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b9585431a4cecf237ee6f3e70f105beba4dfc65e138842afddb26da0784555. 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/CNZ131300155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fce93b44f7d5ad3bdfba2ee1b000bda49cb8db8b5130fe5b68d21cc16d2c56. 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/CNZ131300159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1f8f7b7904e04f80d908abb99b1e19b3e923090672a1eea658af9fb284fc97. 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/CNZ131300146.
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 0x6653bd1248634777b7bccd2dab0fc4206daf61bd98a76a5b18f17d6b6fb984f4. 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/CNZ131300158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a7b4290fbfdf4cae735984b95b2631923f131c0c627126c67a7d6ec364dd89. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CNZ131500106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2063804210e53e45685e9cccb9d527593f211ff33d3e484fd3ed9081f72fb571. 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/CNZ131500112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda3f855938708a3c9a983b169beae24f57b98f60f5b846b180f0f0d0a325b0a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CNZ131500115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a01ce00039028e70e02004d036c482b91d69d3efd2f3be2cc8d36b68bd593b. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/CNZ131500114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac93095fffcf768aadb7ac2d55360846438e606c1f44741e06515d9dd7cc990a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CNZ131500116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174ad89be0350ccb74a4fa327f7bd02e12fc7d0be0be1b25ad42445e1f8f4a39. 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/CNZ131300140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42746bf870d30b6698c2608c95d6e3297b542b4b73275c2df5d9fef49be6d3f0. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/CNZ131300132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95012797d3583c4b7b9349c95e691627b157aae8b3b2ed94c3f78b1e24d49568. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CNZ131300134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9557eb5ef50f0c9207954ed34b3e53a1c7f8fe8133ee65bd664be8d553629122. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/CNZ131300141.