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 0xd6715d88e5fbefaab9863acb1a9323a9d1e553577a03a807cf6ac9ea22619674. 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/e05e3241-d5f0-404a-af0e-96ef2fb1c807.json and https://artists.proofprofile.net/proofs/artist/e05e3241-d5f0-404a-af0e-96ef2fb1c807.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 0xdc3885b444c5a52870b786620d79930c394f7d8d60e34d743bb2cefb2e6a304c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZMER2411577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7fa69fecf7f42c900d1605b161532af1ee68a4d1a77f5f7f7f231c5156f44a. 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/QZMER2413813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9762c783e40e9918bc601e27320a5ed6d8ef4af6c76e1fd84cf5338dffd7835d. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZMER2413821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91d3e832a642038217c9287aad2f2339652969ae7bff79ccd4dffeee2a4e05f. 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/QZMER2424740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa014b1c4c604809b4d6f68becb1c8a4b5d4d508721119317965e3431796827. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWQ2487143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c4e3a8f39a413b3503675ac696d8233f671ea162633e48fbc184489656cad9. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZTAX2474366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc5130a8db3d07cb54bef66ea30e01f15e70c8dbfc86157581f4f03e9e67b2a. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZTAZ2482667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2e749a96b1990e007cdc99de1991885d998edf15a82847525e14b30994c4ce. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB22491965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30074cfd7965ffa9b5ca5face35de4179d3778f468f1303ba818b16afabc4142. 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/QZTBE2440500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67073f2f03c2d745b561a62b138f3073c84842a17391695d246e31b703f5ed38. 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/QZTB82463057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609355092601a8eef4c08a8accecaf78deecc756a1ee53953630b08b2672c500. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:01:16Z), 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/QZWFH2437298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b83ce1f1daeb000a63f07436125ab24d5cf58159d18ef2e42964adf956d494c. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZZ7W2437596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3f749b6b3d5c910c3a07c226697099288dc311aa2c89bef19129fb7f498c7b. 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/QZDA82527900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7891155ec4fd9a16dc41663559e09c37813c3b3e9d305ccc28fd517386f4b2. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZWFT2422727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0711e17cad6a3b82e1d9d67393936331e37d292a568280008c81052b223102e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWFR2487384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f32508aa6fda67c52470af8a7d7cfeb98d84dd723d2ac039af8c9cf5c9826eb. 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/QZTB42426269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04e7d68ff5bd3e2bc2885eb10e14700bf620160663a7f95b96918d0d4755466. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QT3F32491069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa789d5f1340fb651c9ed581f5224250b399085be9a2c799845e2efc7c422e78d. 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/QZWFH2436173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e73b377c1506457d364fdf7d7fd1afdd2904cc10dfff2e494ab59f38b280135. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZMEQ2459684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67073f2f03c2d745b561a62b138f3073c84842a17391695d246e31b703f5ed38. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZTB82463057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1857aea183d43e8b72ccd91c1d3217b22234e1467671ab71d0d6fce248b46f. 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/QZMER2501533.