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 0xe79e3e9d0072914c83802f8cf327d567395afdea5e3f7ea895c6a6cf5da3ba65. 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/d0d11945-cd10-44d3-920f-871acdee3a41.json and https://artists.proofprofile.net/proofs/artist/d0d11945-cd10-44d3-920f-871acdee3a41.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 0xfdef2a259f64f259c6451e0e8f45222a688e35205ae1e858ab5841ae76afe2a1. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:42:02Z), 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/TCAGZ2376932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b9afc0f71164bb805a59bde2421b0a3ea6fdf7e5c00b776485b4e368d70d1f. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:28:12Z), 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/TCAGZ2376969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fd4b0da06d81f2f9d42a049cfae6be5a644a95ae8f8fc70450d2245183f5c9. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCAGZ2377000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138113e306fc2c417f7087009d72b22dffc3cf1f6ec9b8d17fbe02b4e06f5cab. 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/TCAGZ2377015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68196fae80d158a50a149bab7737fcb8b5452e0f5ed2ebb3c8180f41f553ff6d. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:33:45Z), 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/TCAGZ2381176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb467790b60bf829e7ae2b055c6df11e78fbb588b8e8e2f2b9ddfb047bd47b9. 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/TCAGZ2382420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3446a36aa2e97e4c61562921a4a0edf33d46b09c7d6829c3cbe705e75a6bf686. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:12:21Z), 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/TCAGZ2382429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4bb1d248b98f3af29039c9aaab404c53333fec68bdac32e7b0b828313e23dfd. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCAGZ2382437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d39d36919981e91f3acb104c9334a68e5e21cf3971fd380da09b12f79dbddc0. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:56:09Z), 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/TCAGZ2382445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0673894091e919c1f5c4de5137252e2a5a9930b8a4ab82ed89d996d00c4478. 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/TCAGZ2382450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d47e3075de828f9309632705dab67887c81011866effd04701f7c62ce10c5c1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:11:15Z), 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/TCAGZ2383615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609862cbffcda30fb15b2fb797ff869aae09668145e6999e91486e74585f2272. 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/TCAGZ2383634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5234b8a319185488dfc27533004f3b3d7e47ea438425c56072f065964c01368. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:31:07Z), 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/TCAGZ2383643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e505b6265c29cb90cabaf80afe20d0607052997af46e802c79a47e6c9885f05. 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/TCAGZ2383645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f88871df2f8ac121d26e47ef0f1aac57f73b0e1723a0a2458e97bd5c7ebdb7. 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/TCAGZ2383662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411b9acfeab8cd674bed64ad3faff951f23a36c95a482ff92abbd05659055129. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/TCAGZ2383664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91937e301a9f4bf4f2a68c3fdb51b22f3b32a56d438170a59069f63cec646b2b. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:31:07Z), 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/TCAGZ2390261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa822bb78dd90f7f87dc3a6cd554a76a71675aac3052fdf90a5c009116a639126. 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/TCAGZ2390272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd801364cf845015cf42079cb9dec939d2b4fa9227f5abeb7d3915384ec1bca77. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:23:37Z), 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/TCAGZ2390563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d855af551fad4cd99f4f2cf59551f8a3e7ef98fcf576f020097c31a8833580. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAGZ2394775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40a999f6351bd99fd19d1094a26edfaa4f669e72990394a5d4010489606dbf3. 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/TCAGZ2394792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd144d17bb3c53985e618608c57890b52842fc1ec3164728fffbfa6cfb8b3c1a1. 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/TCAGZ2394797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a666ccd7c13f47675a5b4d3b1c7bcda5a960fb2660ebac28ec30c76cca81a4. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/TCAGZ2394804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a69a3f5b9ef791cf8db2c4d39489024a0269f94047521412facd8f8c03ff96. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAGZ2394809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3f99e581ea77c7566bdb0e9eb568b013aaf71adbc5ef56d3abec073dd25d37. 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/TCAGZ2394816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267257c3744467672c45efa156101a1cfa96e00ab191abe24da65094821fe4db. 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/QZNJW2529784.