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 0xeff4dd5c5f2e7b012b06fe1159de51164a347b3f18f4d18aa36adc3edf4f0e08. 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/2a12770e-06d6-4a49-9216-fac9a3a91d8f.json and https://artists.proofprofile.net/proofs/artist/2a12770e-06d6-4a49-9216-fac9a3a91d8f.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 0xed9ce8dc1aae8893d3e5a357631a892fe49e5142184db5efdd1b32f5f83e21ac. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:28:28Z), 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/DEZP72400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25af8d36b9e8ad26527c870a78e86a53de83a355e7d64972c72aadf4936c8e11. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:12:59Z), 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/DEZP72400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afbcf7e3434af247499877f564a22c32e254930fe497b865b1b4470f1f7b7b6. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/DEZP72500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080c179d91240e0635f210f73019df8b36df4d26af0dc68e4f152c3e9f3073e3. 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/DEZP72500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf9aeefa5f9656f89b1b45c196c5dce09e284a5ebf466d9aa6d2fff1b08ba18. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/DEZP72500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8edefda6852462116258c60f04550041a54b8ccf61bfd565400d2073c6d23b95. 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/DEZP72500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2aca3f83573810ae768bf2841caff8f56bcf64a6c419705b4545a47ce05485. 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/DEZP72500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a49d461c1730cb5902a4ba06ccc417adbff4e6da5aed9763b64976d4acaa67. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEZP72500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158f4d99b96fe0ed2ec3a2e75af9b10de8c8b6ea82ae202c2a980657f781e772. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:11:51Z), 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/DEZP72500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef54249cca16d2ae01907ad88270fb2e8a1b1eeb89adf25bfe558a84627a4441. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:34:02Z), 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/DEZP72500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebf4916cbe56537d89ce4879c833ee604393121d16e56f55a595454ec5100e9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEZP72500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a476914edc15ae994b07f7ce069f48cc96b0be6e050411533860091e635740. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEZP72500016.