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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd144c4ff47c8fedf3659748c577219e7e82bbcdd3a52a3027061c471647947. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84e8c372-4c11-4a24-9bce-32e34b565550.json and https://artists.proofprofile.net/proofs/artist/84e8c372-4c11-4a24-9bce-32e34b565550.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b043eef6e2363e0eccd498bff33360d5ea9607e00eb9d66dc4f30af349f0d2. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/GXHND2522057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174776e4beac89721e31cd62722fa3eae941ef842e4863274bfcc4c9a4283ddb. 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/GXHND2523388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44be1e90d474366d8f82b6ca6f407699ccbd459349ee5377f0d199ff04602740. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/GXHND2523157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365c9dd5b177e38971e71664d13324d328818be6c26162e3adcfd13dbfd5e3fd. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/GXHND2523080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011c308d1f32022c1cdea370865891af4aa58c0f624eacba68de86025d5514d8. 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/GXHND2523081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29fc05cc39d082b2a328db3d88e131e3989358f120942d06bbaf285efeb7d07. 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/GXHND2529737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf0e6594d211399b2da122aaa75714051e28dc0a2f7b876ed7aff8c86c26fc6. 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/GXHND2531262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d270d40ae39e41b873b58e9461b63e6afcbda8638acd2b87498db3b0c1b1ea. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GXHND2542007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9697d693019bd578fd2cda05fa6fd2b86f8aee336d68a5239618fbab3e413e. 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/GXHND2547299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e8779668f466394150f6fc3d9ee7d5d0618f53bb7ce5bf7cd3583e33dc1645. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GXHND2551850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10687cf55c3d15a3cd6a002156f43292dbd219b67a0b5f82a462a750f63a8ab8. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/GXHND2556983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e739ec2b5f989e9696bff7da75f5fb42cd326ee755b4e2a50005ca85ffba2ae. 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/GXHND2565113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05cd5708b9f4fb7a7160edc7b2298711b9758d197e5bd755cf914c0d63cb0ccd. 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/GXHND2577832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16376a2a0e9547ef9b51fd958beb1ebfdac43f71704da8d2a99e1e45e547035e. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/GXHND2577831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664128f7751c2a8c679ee2099040a8febf1897466095eee09d22d7132c8a77e6. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GXHND2585285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e47eb1dba1640ce2dcd49c3bff4e6d93ed5c3009d676c0aac7c6f7674344d39. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GXHND2580690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed0ed4a7b34f3fa6e647b57c0da8581e0ff06f40aafd845cebac9c30be89aea. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GXHND2585246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b80343016d17ac9eb16cda2296ef0435e6bf7ca18b462c6462bd20256c100e. 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/GXHND2580687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98ee78d25552166265408b69a510c636f81bf6d8a25c8d4c380ab4ec74fa983. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/GXHUT2517552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bbc86b3e9c7bcee9a9d053fa0b74cd7a3f8a855c3fd09b9e069e93c20858ff. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GXHUT2529747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05011309289e50ee3e863bbf48b374001c4511e6e3e7e37698f1f8020ee17ebe. 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/GBMA22610235.