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 0x675b57bb45c2f91408ead87bca288a653dbfe9a021241e60496ae95516a07ef7. 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/08afa5cf-77b4-485b-94e2-8bf309ed8ef5.json and https://artists.proofprofile.net/proofs/artist/08afa5cf-77b4-485b-94e2-8bf309ed8ef5.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 0xd8634532a03f60eda3403ba2c4820c267f86c29aff855396c6682b5fa3335e1e. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:53:51Z), 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/QT2WN2400937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6db007414918c31238c14b3c2960464eeb699e0a3eefd9de722ad2da5eb1e5. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QT2WN2401274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ef4b923e53892b7f946dfd002c06c26bed32b7f09a460f8bb165eb088f1a8d. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QT2WN2400946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36da33bfabe53d9b83a9d687e940ca9c93e2cebbccbe176e04583914a3e31f7c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QT2WN2400955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455a3eb31235b449869d43b99b277539b485f64ee0acc942c932b5f7c5598390. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT2WN2400961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b37d5c94bf1fcb0abfba6b306608eb9e58736d3c6fc7ec027d0ebcc1577bcd9. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QT2WN2400963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9d3b264efb6e2a909936f93851b069b8dce00455b419254769d4455738be01. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QT2WN2400981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b200c3e92ef68a1aef6be4ee70967f907841c416e0926ed13887736aa44477. 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/QT2WN2400995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeea38a60384cbe22fd9fe7533ddbbbfdd2eb7f63fd2a841d34b4a67ecfde811. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QT2WN2401001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44760299156d2a4c5ec073659af8bc2626ad44a47859ed53383fb56efa16b29f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QT2WN2401003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa939201d5fb89df49ae9297057ddc3732494585ab702cadb00fdbaf8ee0882fb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QT2WN2401833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa44bccbdb39b52e490b8e0c9a1079d748e05cd3f9739a18499ca12c501f2b9d. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QT2WN2401020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b979c0bfa13b55ff8d116c50ac30970ee676d528921415d7d71efa5e4a24e57. 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/QT2WN2401026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c2b9e5b89f64b53916078ac08529d150c05344c0f21a2c1b65811e6d26f9c8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QT2WN2401027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3958db09a6c9778820219da20523c1521902ae1f413266640f919c3fb867801. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QT2WN2401031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9400b66c168a00a8983f3c424bafcf5b6bba1146a422f9983c1fca77311bd24d. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/QT2WN2401041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd982b18bbc48d3b1e76f9f34c7c27f37584201cc2d901c8ade3d87af8b7eec6d. 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/QT2WN2401052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9914d88ce6ee822cd0db28a0b365a2cf1f4f900a8786c16de2ddd80d25c51255. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT2WN2500503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1715ae4d47ff1bb2d1a27e149baeb16bcf39ed7f2ee7773ce03afdd05c23e01d. 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/QT2WN2501218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9256ea225c0d8b4d8c94e52fe0f4b2838266610af79f1eceb054601b1a42b64. 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/QT2WN2501219.