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 0x42ce930a5361e03b6e7c638f230ae6098376b97061578cde117f43dab495d8fd. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db845035-042f-463a-bbfa-b3a4769913e2.json and https://artists.proofprofile.net/proofs/artist/db845035-042f-463a-bbfa-b3a4769913e2.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 0xdccb40ef441a026ef85308746ca734b9b010b9249e38a3762c8d7105446ddc7d. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZHN41965272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae87a4171613de31a24e04b03f45246e4d801d8ebca3a87823d7ff57ef04c47c. 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/QZDA62097967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bdb595be38970ec84ca0c61a4d02156f28ce8973ca42c98ac954ef990e42f67. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZMEP2402618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d005939b0d90f40f25669ac9e5e58f912610c69ebeee2757926f46c8649865. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZMEP2426237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496f215b1717cc0bd442ab75828b19132f9bd864ca0a3dcdb9ec5c04f459e2d5. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:27:45Z), 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/QZTAX2437201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa914980f00b558d2f2b925caf4b252432482380426c1df7636d89329533e6270. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTAX2437203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ba58885118044723844b6a9f7250c4498834abcad9a85d4b63a960a53b3693. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTAX2437204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24a564f7d3e732ab7fc2d08f678c139ffba59d4d535f9cb382058b0cbe1d880. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMEP2429158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12461cc6e9cd2a87eac6ddb3ff24400c416afcfca9bb4c5fb6f6a9f20923e03. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTAX2437206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24a564f7d3e732ab7fc2d08f678c139ffba59d4d535f9cb382058b0cbe1d880. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMEP2429158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d005939b0d90f40f25669ac9e5e58f912610c69ebeee2757926f46c8649865. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMEP2426237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bdb595be38970ec84ca0c61a4d02156f28ce8973ca42c98ac954ef990e42f67. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMEP2402618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07b8278a6d54ead78944da80faac7601489b8d8941414e10fc5dbce7c4d0f06. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:22:15Z), 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/QZMEN2472435.
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 0xf095d192f7c3f39c22b336ccb8c2d99502db2d696ef2a5bb6047885cda638a7e. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZTAX2437199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd301e85d3bf6c66d01dde5310eb292663e573b95d5edb91cb1ca5efb871a7b86. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZTAX2437200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddfcd29cc9e7735852e8695faafe0d880579affffe14d607a87a7f1a71e632b. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZTAX2437202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd262f3e9d03785057c01a38e8318e6d27d37b9d5e514bb0ff2d49b4cc30d405. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZTAX2437205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a7549adc544a0447d1f2a6edb99f2d5fe3ed7b8f653048aecdb2bad20e2871. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEQ022003220.