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 0xb4d7c80b972e1b5312939e2b3c7417cf575e31c22d6e45a82a98f7657a0dc17d. Chain 2 (Bitcoin): anchored in block 953638 (2026-06-14T13:10:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/39192876-354f-4429-bae0-a048d5ee66c6.json and https://artists.proofprofile.net/proofs/artist/39192876-354f-4429-bae0-a048d5ee66c6.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 0xd9fdd67b97a08533dda0cf8a9f7610f15be564b41426fb4be1678227225b6a27. 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/USA561080950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfea8e06a6bee0dbc66956ba4a1e874618b77268e36fc485ec07aab163f1c8f. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/USA561080951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235eff5d469c6d40f08281431da5742b438cf864876ee0f785f60f08ab8c8281. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA561080952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2cf3709c3f98ccabb0a1799be490f823b05806bbd2531b3e35c4481b1262be. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USA561080953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6677132d5398832e7322cca2e01e065dd2358706a799ed1d8f351d7102e65b52. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/USA561080954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae82e1b56c2e9f61508d16981d4b9b500b7253180f96a20a4fe201584fcb679. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/USA561080955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb59b48c7d8761a24665a455c360aab6a0ff9423913f6d52ea137d959257a88. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:32:07Z), 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/USA561080956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e004051d031157a5f2fba56b29093112737f4dccdf56a531f07aec3b127437. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USA561080957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174eb181353ac277b038f2d87709175e126137a638e7bed862dcce786e5ef08f. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:35:03Z), 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/USA561080958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e64bdd92d47207b346f0041d67564beec600eb81bd7a60c6b36d8031419666. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:51:02Z), 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/USA561080959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1dc57a6ce23251848edbb44a8720ac7b8536737277fdcc34ac6322e727aaf1. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USA561080961.