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 0x347e01d23c7bbfd62e629ceb75a741aa2d2d8c8c8eb1c53bdd11a9e379355598. 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/8cae1429-d03c-4400-a10b-f901e8abc5a3.json and https://artists.proofprofile.net/proofs/artist/8cae1429-d03c-4400-a10b-f901e8abc5a3.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 0x9797bc4dc2a5459fef35ccdcff5ac77c06aab001e88c35737799959286987948. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USMR50440454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e6bdd32fb617eea8b60d34c983afcee12c629a2408299be550f87a7e3ad295. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:58:17Z), 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/USMR50440456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c71dbd9236d185b1e5c9662953c8893f75cb42631d38a8782aa73f1ae05aec8. 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/USMR50440425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31fb270617404a7aac72978bf4a073c8e41de4ad5c5858eba1207ccc779882d. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/USMR50440426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef122c3c87c692a4947594adc5687688ec77e08441d80cc86e6c714af034d21. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USMR50440427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb95345ce69663d68b7c46582f4dea2b3d331a7e457bf07acd17db142d070e47. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USMR50440429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672cf8702dad67827cad5ca9242287d4b137bf4441754567a5b1de448438f46c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USMR50440436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0d97e67eaf8d8f48088c54f10f6e0b4c58d184e61299e36cb3e85210dadf91. 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/USMR50440402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb383a20d1370afd030b5c17cc1e74811e644f306b0bd1b44beab9dd8be5447c6. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/USMR50440403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07a5c6072f8fc7b81ddd37d1c419f56d680038ae8e8d3e9ba77482aab9c67ed. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/USMR50440414.