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 0xd00654e2069a528d030b2c4f686ecf4e17aa846f7d365ec0a558086597888a0d. 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/e22674d5-9de5-4acd-91c7-913600629e72.json and https://artists.proofprofile.net/proofs/artist/e22674d5-9de5-4acd-91c7-913600629e72.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 0x0bafb0c9f737397d463b95968da9137922206a1dddd1e323b9b18edfc97d201b. 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/NL4VT2100316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeddce636b0ba229ebf00829435357b30a210e274988ab5eae77d3598b7db0ef. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL4VT2100317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75fb359025e427efdf206dafc794f8beeaaebaa5f79546e050fee3bd37202dca. 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/FRR642101356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60921866b894fd411e3eea28f92b424b1f2b86b77a746a244822578a2270bdce. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRR642101357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8dd7bac73c1d1ea52e1f3055cd431daf7a7f068dbe685f681d865f37c534aa. 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/GBKQU1524510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686e6177c911ca38054a401399007218a529bb1620f239bbe303c531a6c0d847. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU1524511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783bd2e8b390adffdf93c03b4b48ec0b02934cfaabe499d7ef71809830a37136. 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/GBKQU1524512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8693b3e465add22a9e8c3165922c4f21200331ffe0a0096fab8d602a790cb37. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU1397674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd29279212d4d5e23e046f5d76211fd664c0624ad789c34360942ac9b90c444. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU1397675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b200c598873dba225b45420ba9d4dec8ecb611966e85be242d6b78ec0cbb2f. 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/GBKQU1397677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471081593f6d8bfbdf12014e575039b955e116b743e67f43d387f9688c3af35b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRR642201584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc1a24f8eb22b70d5be26fdf6005a2086e88e8fabaf74947d905636028246aa. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRR642201583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783bd2e8b390adffdf93c03b4b48ec0b02934cfaabe499d7ef71809830a37136. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU1524512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b200c598873dba225b45420ba9d4dec8ecb611966e85be242d6b78ec0cbb2f. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/GBKQU1397677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc1a24f8eb22b70d5be26fdf6005a2086e88e8fabaf74947d905636028246aa. 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/FRR642201583.