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 0x4ac7adf8c7ea0e8b3b9bf0545179544b5b52512cc99ebf0a9c117bf73a5a50dd. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ccb18004-26fe-4705-87d4-2859a357cb7f.json and https://artists.proofprofile.net/proofs/artist/ccb18004-26fe-4705-87d4-2859a357cb7f.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 0xc927349126a612dcca51dd1500c4cbfa1301eb1e2b3ae887471b03eae2905611. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DKADG1700554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52abdcc84e2a42d6c28b6e7ff9ac85cffa8f022fa6ca10ca62fa3ac885a7b427. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DKADG1700555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3d4fa3af625c3cddce04df78ce3d7aad76a201c7bc99a82ba10a48a5ba6b53. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DKADG1700556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366e7467db605bb29ee35a5c5fe44a35babb8551d1bfc1077c93e74b33987dc5. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/DKADG1700557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a84c9d69ec5e7b6ea6a1f1f74da47f10ab96480767999a2e71a16374e19958. 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/DKADG1700558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089d7b2bf5a38aac7e0b69a71bc964534134399202672857ef704b0cfb0d013a. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DKADG1700559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa6d64b6f1be2cc69a60b58b59efd42410de0c7e415003ac9e5ab46bcf54983. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/DKADG1700560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501c0cd38c5bd7553ecdd67d1c40c3e86ac243cd93217b7fc1088fee8f60d191. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/DKADG1700561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20b8946b7c94978da00ace29ede4957be9c6185ce310a7ffa48972eb88ac9bc. 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/DKADG1700562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ecd4c5833ffab4a4c9d46c0b6aeeb7daf76e464f4bb12e627fd9126a85dd14. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DKADG1700564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00010c085a370e7ee05f225d8221fdd2a1c2765e385a8a2f5db0bb5fff03d74a. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DKADG1700566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d33abbcaeb5b9ae1e84b53d74321f5d1cee0a1ce0d2b7644fd9c8c7ef797ae. 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/DKAMG9000401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeddc7266c8fdf478cc4fe92ca5c62480dd3c438ae4eb5da3511ceabd3d1e061. 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/DKAMG9000402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d1434fb94fa8c15848c81e11733fa5a8ed80102c18a55da98627007dba1edc. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/DKAMG9000403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc90972040173223f45693cc86bd5ae814d217e9c8689becd1764f24cc57056. 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/DKAMG9000404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b58d1120e3f129507e2cc83fe56c384836669dbccfa91d4fe29f6b10b5797c6. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DKAMG9000405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62269b807ece8ed0aa44a94358c27f64dcb2fbae0dcea6fcd51b13aa34fec66b. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DKAMG9000406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d3e130680365b18f3efb208fe9db57e4d48fcfb44c3f20d1c56b8d1066fb39. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/DKAMG9000407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ff1e15776adbdc518e10c53ff8cb9690014b4cea77a769d4d3fed7918ff46d. 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/DKAMG9000410.