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 0xe967375b4e41e851d86e4ac4330e88d9c6697ed00c19037760d2fb3ce17c2cda. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/13b94599-9bc9-4496-ab12-c69c8523b736.json and https://artists.proofprofile.net/proofs/artist/13b94599-9bc9-4496-ab12-c69c8523b736.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 0x98e389947ab7251a700ce356ec2bb5903fd8afc710a1d7eed7f01af753e2faa2. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/AR8TN1900285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cd9e245fd16f30c736355ed16c29b06f4c65f3feb2e161cdc6cee4d8d3cd8d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/AR8TN1900288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10b81034e69ef9462ac9a05fdb0ceaa82e0de3336dd5e8e4299086f8cbd7c70. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/AR8TN2000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52039152b63a61b8aa831c4e5f4b1d12fa0abc017ab758cd0c7fe89bdbb7b037. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:55:48Z), 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/AR8TN2000292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdca75d5587b43ef6860884c61fcfa516ed34e065e576b29093c644a7ccb20f. 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/AR8TN2000402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cd80b8fdfb3bcdbd6c4a12a19ad15f536e373f37b026804fd83990ad5bb12c. 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/AR8TN2000403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43380b95fe76d36eb6191fc90d7f1b207c1e07c1dde1775d6bc8c4532e053355. 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/AR8TN2000405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f10d605699f92750d08434402ff1918601a3a5425b048cf0a85a7b49d73390. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/AR8TN2000406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b3ec2d0b670b0005ade57a03365de9c0d0dcf89311bde611d3a529667031c2. 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/AR8TN2000407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31989270b1e3ea911b6d4ab21656d0c1ea80a19998c11ea6cce88f0ab6cf3d7. 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/AR8TN2000409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffc49aff35ea050870c3fac5fe2e7944915f0744f9ac7ad70e37daea56dc488. 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/AR8TN2000411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56733cca6ee309465b81f462c63601340cac05483394d17194ccdfd9bb8305a7. 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/AR8TN2000413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93c3a6468cfcaca3b8291cced2fe1b8b00afe88566aaf629b3416ef498523fa. 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/AR8TN2000415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8891dc45f30828445ed7f53faa7e0a5194e41aca3160d37b0dbfa758a5e7b4ca. 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/AR8TN2000417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c4d83ebea8d5bea4dafd3334fd2920f48c3a80520522f017337db8e98ddee8. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZHZ62297889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ed8154adc7664e1d8c8b2179c4753ae30a7b358a4cf899de27bd8a1fe66fe0. 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/AR8TN2100293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6467369affa5b30c14cf25bb01e8ef165757505efdba0a917cf03d9e2fc86f. 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/ARIXB2401358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dba5f92c3c7c3ac196b47c168678afbd86116b75db237edc730c16f0fc9cb00. 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/QZ5AB2343899.