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 0x876a6f886c1a594b19d2d9deee3ed67af79a3e77bf7896daec3b477316d7796e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/76542040-8e6b-4fd1-8c2c-822a654ada29.json and https://artists.proofprofile.net/proofs/artist/76542040-8e6b-4fd1-8c2c-822a654ada29.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 0xab11e2197de4e47539cf222a616dcc6a2cd03d35868c34f416f8cf16a8f3744e. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/ATT801802001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4825f8092646132cb11d36766c33f1142191c953d142d8e9f6ae05048a72bf. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ATFX22230001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d78c5f6e32c15deadb2be03aa7ab46a8a09bf0e7533889b8453fdef07f9b0b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ATFX22110001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279a0431a8f86f3855292e13ed62d15103456c5ca300941caa3d4930f21ada4f. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/ATI922330001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90aff2e5e3c3cd94807437154aef3b3b72c0e07247f8f9e95917fcb0fa2dd651. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ATI922330002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a96fad3ba480cd6db3b784733e8416def23f6be958ce9f23e1fe45b02f8976. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/ATI922410001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279a0431a8f86f3855292e13ed62d15103456c5ca300941caa3d4930f21ada4f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:58:06Z), 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/ATI922330001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5c94f7d7e2bc7b466116842a6257de9a8ac952039e0feb7bcadd2e07157e46. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/ATI922520003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26bd560db36eb98d8ba2eec08f052d315f8f19adeafc4d3b02445f1609b9fe62. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ATI922520002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26bd560db36eb98d8ba2eec08f052d315f8f19adeafc4d3b02445f1609b9fe62. 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/ATI922520002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a4bc0ef2fffdfc807a1289c5b5ad33d93b47f149d43eb841bb320600ba9c32. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/ATI922520001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1280faac8ca771d4921902b7e588bde1acedd9d00d11f64ca835d3457a9c58. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ATI922520005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b082b4b60ed6e094c83eb0b1c908915e4593c28801901ae5718c4758becc42. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:14:22Z), 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/ATI922520007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279a0431a8f86f3855292e13ed62d15103456c5ca300941caa3d4930f21ada4f. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/ATI922330001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a96fad3ba480cd6db3b784733e8416def23f6be958ce9f23e1fe45b02f8976. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:49:35Z), 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/ATI922410001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90aff2e5e3c3cd94807437154aef3b3b72c0e07247f8f9e95917fcb0fa2dd651. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ATI922330002.