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 0xe4cd29ea9e4cd942a417f285257676ab3dddc6cd69bbac03cfcb402d22e22d66. 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/6fc4ccef-8fa3-4b31-bfe3-1da42564ebe0.json and https://artists.proofprofile.net/proofs/artist/6fc4ccef-8fa3-4b31-bfe3-1da42564ebe0.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 0xa964bbbf9851f5a1d924ecfb81c90921d57e4cb8be2cc326b40cf94e48348483. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:10:17Z), 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/TCABS1338567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2836d3c9c3e21b51bcea2da936bf961c5068f7ae60f0c4ac531d3f85f2cf85ac. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/TCABS1338568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9c54eba818107b925ccb92306a0f06dd0a9f58881d97fa0c6a1d3355665570. 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/TCABS1338573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8d9fd682d3961a7b9603cb205c92c51dbd185d97bb27e56fb701f84f326359. 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/TCABS1338577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa53d8b36ead93f66917b8886787b2079aeda906ba7d1d029f18e985e292bac. 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/TCACO1644916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a7ad1b0d6c9c727830f89c89e986cf23312e6ba7bee458b8cc416fb680dfc6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCACO1644925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b3a0dc94696da99bb4ef66e29e954771f685fccb6e90ef7e7cd6181565c184. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCACO1644927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afbdccc98c260f0e1f9349f6fc7ddebee6262f5bf929f8ce41160b95669e761. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:44:21Z), 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/FR7JN1900870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452188318aca40c54084d126120a7dac6add1e2df55029d20246410b18b70165. 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/FR7JN1900400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c04659ade688f57eb1c52ad3065ae49fd585697b649f5345b4ad9e70363025a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR7JN1900880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eaf45de80f62c72fc5090d080283877ccb527c82ffcf72cfa5d12ae61eb5719. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:25:42Z), 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/FR7JN1900910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc3daa25e1b51b248c6788acd4857219ce8761d1d7488d298155ba75c98e81f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FR7JN2300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db3b3e0da4904561d6fbd458eb52bed8501a8118a6fe396fb3ba96e5f9ac281. 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/FR7JN2300220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe010d6e100c83ffacc3a42ffa02b5236c500dc236b7d0356baa83acfce825846. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:19:24Z), 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/FR7JN2300230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a0122c73a49d4975f83aca45dd14175834ca841eed5956085fb9ec0ae45654. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FR7JN2300240.