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 0x581b252384a54aed8be5d9581f61a01d1edb327a992d54cfc044ab0969d6bf99. 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/dbe3b5e2-d1af-454b-95f7-31fc7cf90b5d.json and https://artists.proofprofile.net/proofs/artist/dbe3b5e2-d1af-454b-95f7-31fc7cf90b5d.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 0xe4e2d13a6485079c29fd88db3af226bd0b24e9ecc8c6ad912d773a2d4911db5d. 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/BRI5K1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b9243a079d5315a1ea1d972d6cc1d296e569eddb284f7946b1d57443e66631. 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/BRI5K1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1d9e8dc0b89ae3eaf7d783d312f01b9a8e44d3f4cb4554a133f8b419c2a1e2. 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/BRI5K1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e2d13a6485079c29fd88db3af226bd0b24e9ecc8c6ad912d773a2d4911db5d. 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/BRI5K1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8611318522e38c32ff85742b16344826a4fe61bcfe779e47fd34038cf346eccf. 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/BRI5K1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c53ac8af15b10266b5b5f9cd64434811281b316d5fce94eadcfb03edfcfef2. 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/BRI5K1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51391f89343aabd0c3cb43efa595bb41ad390763a0adf524643aad09c8e27653. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T17:28:51Z), 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/BRI5K1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ff5faeb1e8ce51368be685acc1999dbf357a9beb60b77edaee9d5ea7be5c1a. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:49:04Z), 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/BX9ZT2200194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d2edd28e009df9846723ed1735623943dbe0d6da42c9ff39b5659e190d4831. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BXQ7H2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e95b37e9afd8405732f7e2703e5a8c60f8b8d28aee07b5f54f2c106d1640241. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/BXQ7H2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca31a7f9e41d85e7e83a156268b7e040db7656ec9a4013ffe79e207b86ae2613. 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/BXQ7H2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8772d47ffe810384395208cac57144ec580fa3303aa37c8d366bc51844ef9402. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/BXQ7H2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1006aff34ae10b6680e57b51fece7a116b5da445c3bcf238b676887021565d. 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/BXQ7H2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d932f7873a8006110536a5b9b2987be081e4db846cabbcd8812593eb6cb45f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/BXQ7H2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e95b37e9afd8405732f7e2703e5a8c60f8b8d28aee07b5f54f2c106d1640241. 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/BXQ7H2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe112d38ac791719acdba95bfa8b98e611eb9cb27e0b23f46ba2bc57b07077b03. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/BXQ7H2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54518de023613f42791b9a7b2caae83847d40c98eeaac754cd123219b0e8cdec. 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/BXQ7H2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d2edd28e009df9846723ed1735623943dbe0d6da42c9ff39b5659e190d4831. 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/BXQ7H2400001.