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 0x6d6ebc6c300a58aeb2aed5b30e7c96dd0bd8ea69c341e21d97a9ef06913d18e6. 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/57e1d9e3-8fa0-4d41-9e10-77aa6fa64bca.json and https://artists.proofprofile.net/proofs/artist/57e1d9e3-8fa0-4d41-9e10-77aa6fa64bca.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 0xae80ef295205019d0ba6f9ffdd2525b48e5338f5a8c0cc74ec04ee6d6265f155. 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/GBNRN1160602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76db176e90aeb3d4b59a16db6cfb0a30beac160ccd9e6bdcedcebbe5bce0a4b1. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:32:25Z), 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/GBNRN1160604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a24375bb121c2a52da70a6748796f08eee8b041394444ce3177eb1b86e33f0f. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/GBNRN1160605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179c69b6610ab44c62937a2db7af3c2c0dba203801bd3817805b5e402debcefe. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GBNRN1160607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60503ca9f4ea6434af2e7b61fb0479abdfdcec37b71aa8eb3bfa3968deb77131. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/TCAHH2370019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5375a57d3142948b846ffa28df0ab5467959db12b36d8959c1f849e570a2884. 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/TCAHH2370021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb8bece5fb36d2b87aed96a6c233738155d2dc96d836f3580009fe6d56b3037. 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/TCAHH2370076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5569a72cbf3961f0ce0e0e7f3cf2b4ae0bb44f02fe4cf9303faf42374ac4807. 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/GBNRN1160611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75dfa22191bcdd0b0d61af8d1717a0d5662689b1042b769976470138041ec220. 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/GBNRN2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0a617da9bd1bd97a4b9763698fbc86fba9357aa35090e03cc812a68e254091. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBNRN2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8393e0f02d34e6cec78277d9096860e8679217ee25d28537f61a18a36eba84. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/GBNRN2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753c79135447dc399db99d82bda6135a7e4e3150fb3dace75bbec7ebbe19d101. Chain 2 (Bitcoin): anchored in block 957692 (2026-07-12T10:37:51Z), 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/GBNRN2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3ce77f2ad9d71443bf30689043d073163ac61e68e98ff8fa5f7ddc6fc39cdc. 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/TCAHH2349046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be645bed55b815eef135cd4fa14f68c99f97b1eb4c4aba2d8b514b95a7543de. 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/TCAHH2349066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae916a7c14be7cc0e2b177f58bed09a96bc65680ae810266686fe490de82b7db. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAHH2349075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4afcf59de9525d8d3dd39934a75fc5e83fab1cf10fe3dcff5549b414e3ece5. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/TCAHI2354438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9722d55a91fe421c152c01008dc59aee422641f8be73d70471aaaca016fdbf3. 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/TCAHI2354607.