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 0x277137cd55ed611956fa60a34123ad149d3cc2866d08f7e9d7fc7f119652a576. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5514ca9-6a08-4b81-bcab-13184191988f.json and https://artists.proofprofile.net/proofs/artist/c5514ca9-6a08-4b81-bcab-13184191988f.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 0xc78470cb701b30eabd0a3ec0c2ac8f5cb8746e5ac2db13e1f16d2d5369bcdcac. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:58:27Z), 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/CAGSR2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf425a6f8214144c910439b48d6466ce4d9b31b4e3504de4f58319c8d20a78b15. 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/CAGSR2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc658b401e127892a5d516de3b1313cd7fa1caba7a83bc1d06f26538c74bd6998. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:43:45Z), 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/CAGSR2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018d455c0e746fbb34e69b14db653693d0db69b8abfd58e297f0add309422319. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QT2VB2435894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2cad01958aa26ac9a278207126bdf2cc72c8d32739fe4397576cd2c3827994. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:19:00Z), 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/CAGSR2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1484a017e107251cda1fa2e6588b66e2a35756bd41ea52805ee0ba9d9fe8b8af. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/CAGSR2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d0fff2530a0820307519756f2b209a0b184240b233552c20305bbcc9e114d0. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/CAGSR2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2cad01958aa26ac9a278207126bdf2cc72c8d32739fe4397576cd2c3827994. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/CAGSR2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1484a017e107251cda1fa2e6588b66e2a35756bd41ea52805ee0ba9d9fe8b8af. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/CAGSR2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d0fff2530a0820307519756f2b209a0b184240b233552c20305bbcc9e114d0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CAGSR2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57402a0f3656953494edcaaace78b2af25bfdd5b078afd731083be775c606fc3. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:53:28Z), 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/CAGSR2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d183fa64107a82c53bba1288252768159607f476f39b5ad03cf9f4c5fe2aac. 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/CAGSR2300021.