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 0x01688d7e7783ea2c79a257333c7f5d45a1724bbd7ae94e71b927b69c5efbb3f6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa5ccad8-a591-46f8-bb54-c41584e71a01.json and https://artists.proofprofile.net/proofs/artist/aa5ccad8-a591-46f8-bb54-c41584e71a01.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 0x9d64231c53413d5a89621a18589a0f9f7d3fe3d5b641ba5659f7766d21f63f4a. 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/QT3F32426353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ced5f3ed132a5ed0b40795ed1c010a74145881887bda6309ca314a805117ff0. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QT3F32434929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ef6a613acaf9e194c702b0216d73c95cb7dc9cba24bf6bd449c96df28c3c46. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QT3F32445612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233bffbaa6bee562caf381e6825d989d4c97e7b42d19de91825789ead6b4cf37. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZMEV2570126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc940b3b906a353725a42f613a14fc4dba049852bdbcd63cab4b3092ecf0abde1. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZMEV2581221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1bfc5f9b74df8061565ddc670f30c6c6cec645a4dfb0a4471e629d626cbaa3. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZMEV2581222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe2353a0e406c0a1fc7166ad66aae5c03386f743344565b396650e13b12e6ab. 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/QZMEV2581223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba7157b87cace1be9ab7c7fcc56f5eeeea38cb030946e5b0b3f7fdf28990de3. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZMEV2581224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53aa132ebf19e4ba7c4960762fec77d51c3632e4e457a1cc86156dacd335c701. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMEV2583349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5545d5536f459eb645e98071eea2f2ae4418d716e924064cbe6f164fa04999. 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/QZMWW2542726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcb301f665597fd9a2d353a9b1c8aa2014c3d9e78cbd66d4b8b0b79c2307b09. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:44:38Z), 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/QZMWW2542727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2dcef3f2b28713bd5562b882fa0aeda738098ede7de92e25708f27d80266840. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:36:10Z), 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/QZMWW2542728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ccb491eb2cee0b46888ccf66a77daa4c456bb248a826fdc0d981e6246e3b1b. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZMWW2542729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd561b8b5fbd8db7773e12929b58348f507fc6ddd59074edb778e2b4ecc0c1913. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:52:56Z), 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/QZMWW2542730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9357e2df08b037a5f823dfe92326875b3d0a011031f5639c0bc9fa3ee053ba64. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:02:06Z), 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/QZMWW2542731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5f8d7934935369d4229bb57e525a47fc6abb50a82a6f65ab5b4dfcd8908766. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:29:22Z), 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/QZMWW2542732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e08ee99da14bc5e924f6584e3a1c86b8de07a24144a7212362bbae68aa8feed. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T14:59:19Z), 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/QZMWW2542733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2186a6b1ff8b4357f3a689e11e3950c5247808ad23fcc01a337648658c0952. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:04:35Z), 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/QZMWW2542734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690c7a3b9f9049df0396dc1da73062f1a658f11d0f740088a5a3c03fb55e278a. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZMWW2542735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde990354e8c2c2105b1f69b2a475bca0294db6ed22eea2ab66e2ef6483fd6f4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMWW2585416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeba14721226f389510db8da2afad9022f9443eae51356b1430470b803e4597d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZMWW2585417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc98337182f466b0da2edc636fe8a20dfdab66a18b9e760121b44d4f6a24d4f0. 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/QZMWW2585422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeced23225ab6af6b2b6b5153249badf6911e0700dfbc6bcd04337bffcc296de2. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZMWW2585423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689deb91747fdae3c5958bc188ef76b5a0dc59abef5a2058769a8c6e223e72a4. 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/QZMWW2585424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcee36b721b3acd137ecd6e35a257bd3edc940d9e0c70606da51a7822deece2. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZMWW2585425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1740c0d6395312fd12e6c96990ecbeb8ea3ec9a80c97bfd5d4e977bdc64e19e. 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/QZNMT2517348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79b7f0612c3b7749863bbfb6fa3fde542c1ecb2237bae347703f971f6546114. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZNMU2567073.