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 0x4b4c0b4a56d4b78570b09392ebc4ee0e81da0e3e28ccbb087e9eaeca2f37bbbe. 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/efa5818d-bc6e-4391-9f5f-937db6d4e41b.json and https://artists.proofprofile.net/proofs/artist/efa5818d-bc6e-4391-9f5f-937db6d4e41b.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 0x3de45066e988c3b8d357660fcb850f15d21cc2832f2c731bd2e2f4126d59d354. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCAEH1967868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393e47ceabe9c8a2d3003f2bd7a74e8f5ba03a66f2e9d80e2913d0953df6d392. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/USHM22210938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fc975435b31f7269b7b7d1a1440076a0f76ac4c963c18182cfcc4949f3840d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMDA62493948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4ae11800a146993a550ccc8397704517b29691fcdf1a9d66b015c4dd52f6cc. 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/QMDA62493949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf161118331491b66809413c7b1785c795bd68cb7baeb612a123fb7e030926ae. 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/QMDA62493951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15ba62f149dd3c90400793ddd8ca7f4abe57315cfa76dff84a3d918980c0a78. 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/QMDA62493952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e5d3bf578fcb636460b9df1fbf058b5ab1bc49a4d3785b47fc3f126f78c2ca. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QMDA62493980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a51e99126b3d286060b811f0b6fc9a44a1bfdc26ef20ee03540e2dfe69f512e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QMDA62493981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cf911a461696263ea35dd7a2c3ba94ca201aef62d14f75c4f76f63febe0b5e. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QMDA62493982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8e66d94b1de7c419f24a2e2b3e63374af5e185e02bc7d418d5e98398e40fce. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMDA62493970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fa3cd1b613cd5557ec5b315bce2d3fc895722abf9c0b63f64feb1f73459cdb. 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/QMDA62493971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ecf08f2e4f353ee979a64a44f09e731b5df9a463ab3ef96466195e3596e292. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QMDA62493972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a589864b710e915b20157999f47d3d0bb172f3a36fc73552a1d5d671e922ddd. 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/QMDA62493988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789e5d936ac84ee90e91a841dba34caa3e3f44e8a47a65e6e89a81fa3129b7bf. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QMDA62493989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b8da753555d7454f2d1a840df8dafeeea5d83c93ea1a2ff40213a1c52f6719. 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/QMDA62493990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf815581448e19b808753892262b609f6f5e907b87f4bdefaa9a002690a32ff2f. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QMDA72450562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8802d6fdf26dd6a5b85689dc2e48679676eb866bb65b5ebbe424d5732522a0dc. 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/QMDA72450563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e7fb314c61b91156d61a81752e200a83af1f917888dd870c87b1a4af4301a6. 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/QMDA62493950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8bf9ba435086349654208d2caea79a3af7cc4d6213b4ce09701eeb0fd9a1ab. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QMDA62493933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4ae11800a146993a550ccc8397704517b29691fcdf1a9d66b015c4dd52f6cc. 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/QMDA62493949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8e66d94b1de7c419f24a2e2b3e63374af5e185e02bc7d418d5e98398e40fce. 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/QMDA62493970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb13bbb183730ff7c4cecbb0cd7b0cf8aa8241b463a5369f7d64d69cc7ccec61. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/QMDA72450561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8802d6fdf26dd6a5b85689dc2e48679676eb866bb65b5ebbe424d5732522a0dc. 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/QMDA72450563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf815581448e19b808753892262b609f6f5e907b87f4bdefaa9a002690a32ff2f. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QMDA72450562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cf911a461696263ea35dd7a2c3ba94ca201aef62d14f75c4f76f63febe0b5e. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QMDA62493982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a51e99126b3d286060b811f0b6fc9a44a1bfdc26ef20ee03540e2dfe69f512e. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QMDA62493981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a589864b710e915b20157999f47d3d0bb172f3a36fc73552a1d5d671e922ddd. 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/QMDA62493988.