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 0xdf3fef1d51ad79b93f35cebb7693c4d5c810b4fa2c9a1d023d99d7178cfaf44c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/07fffbf6-7670-44fa-99cb-c2e57de7e1b0.json and https://artists.proofprofile.net/proofs/artist/07fffbf6-7670-44fa-99cb-c2e57de7e1b0.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 0x71c2f17ad27e4fd0b5b7b482974d053143218b29e78d650005e0800504543a7b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SEBFO0215040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4824e7d5f4c52d7333dea5e0f20b0c71ac9fe12df9de83e2e30068d40f9d715. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/SEBFO0215090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0676b6b5404461d84e9dd66a9007969754053a89a66047309f7f2b75ce5b4c80. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/SEBFO0215100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d00c14bd690c3641bf3596574f5b14faa2f68de1eba7d6ff8bcf565be53cd8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SEXKB0500301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483a515cc530677c951f07aaec9939119e2d2c440efafa9e5fd9f2a1a06af0d4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SEXKB0500306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f0f3eaf8885bbf7249c95c52897345075fa95e7facd2a617b65cf577c4a1e2. 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/SEXKB0700302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13892af0b590d3f3e8b84a32526dfeb2a97674efca9c04582ea255f33682c93f. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/SEXKB0700306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80140902f4c927632c4e79371be451ad51a3eb6e703a7d870c5b1c0ebd8d2479. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/SEXKB0900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd201210c7e73c08864e8986aef5abe328ac156ed399a73f3cfa7f297e579be7. 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/SEXKB0900109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf0c43dba5232158160e00f5e693e515ccef3da61879352aa8b02b8a5919114. 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/SEXKB1100105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34afef795d2d3a6b7d217b56bd8433aebab900ab069aa2968cff000fbad1db6f. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/SE4IU1400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5407f22c5bc7cc9a20cb647de988669fa03f65b75b6cd0e0fdd5b1815dcf09. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:33:27Z), 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/SE5Q92000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efbbcc5e21b49c4d5e55a4a888aa00f6d6af7f5dcbd141702ba4d2cb3fd1cd3. 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/GBMJG2501500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc5b1ef88c4a35936ba530c398de933c76dc9dc1cc78f755cf646b0416833c8. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/SEYOK2124718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592c1410b0bbf0b1808c7cd84f818cf06ece3daa3c9c88953239a53e6f4bb2d6. 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/SE5752484083.