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 0xea97c6c86582f5730e701471326886ad5e23770cecea26956d9df839e2087659. 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/d58e300d-0908-465c-9c21-6a77f4e6f1c1.json and https://artists.proofprofile.net/proofs/artist/d58e300d-0908-465c-9c21-6a77f4e6f1c1.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 0xdaf7adc1dbfc426b01ad2f97916261dc4ecfda1e2d77fc92d15024fcc26b87c6. 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/FR2X41992702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a99f6a604b8b0d38e37bf3e7135eafab8f8b14e875fa9379cea8fba54549e60. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/GRUM72001613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdc18359155cae3a017f6502a8e63bf4ca1a5e77cccf1edc2ae8c847b75b75f. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/GRUM72001614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb142ab5001c2156668ba5fba9602db9d4d792c4c5bf85365e24b7cee1f930d4. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GRUM72001615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49ade3a5a96db172fab9f41d47a081889a3568d3b52b0369ef256ca16cefbc2. 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/GRUM72002700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1949f8380249ecf6aa65e03a4e8a2f02c4856c61ab188f0f96aba4ed920d5dd5. 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/GRUM72003080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b28c55b7dd046f509d846d79259a97610a2fcc20ae94c2750bdaa7c463e0b03. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/GRUM72101416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca67e4d60ba0122d7e5425cb2037323d645edb0a4e0932dde0da1412c935432b. 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/GRUM72101445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282a354b486920fd4c9c29d081bf29694a33392ea43528ce146856aa830be8b4. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GRUM72101611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66965013b539eaaefcd51c0565805625e83365f885593e000a879336ca0ba6dd. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GRUM72101588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282a354b486920fd4c9c29d081bf29694a33392ea43528ce146856aa830be8b4. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/GRUM72101611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca67e4d60ba0122d7e5425cb2037323d645edb0a4e0932dde0da1412c935432b. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/GRUM72101445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b28c55b7dd046f509d846d79259a97610a2fcc20ae94c2750bdaa7c463e0b03. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GRUM72101416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49ade3a5a96db172fab9f41d47a081889a3568d3b52b0369ef256ca16cefbc2. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/GRUM72002700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1949f8380249ecf6aa65e03a4e8a2f02c4856c61ab188f0f96aba4ed920d5dd5. 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/GRUM72003080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748a9753b7447c4bb4ba5efb8693c5a065e2681ac3eb2e741f5b144329d97de3. 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/GRPA12100409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc04dd8b5c397e441a1d3a30fdf252aa23f4962d1d3a4e4a0498eeef258a294e. 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/GRPA12200270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6353ca10ca6d765af10091fb4abecc8d27bd17076b929eaf102e89f08640fbd2. 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/GRPA12200440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717cd939a5c8b5c67d7de38b17014a657ff429c50a33583f6fdec8e90de7127b. 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/GRPA12200468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbb1c3510f92d209679ed5f96d121c6b4c968259b0ecbf22ad9aea3672a8385. 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/GRPA12200504.