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 0xaac9763873321f40d09c3884bd86e7a176c9d4342fc64021d6f2fd3bad99d250. 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/1bfc146d-e5d9-4092-add7-ad23bd99e4ec.json and https://artists.proofprofile.net/proofs/artist/1bfc146d-e5d9-4092-add7-ad23bd99e4ec.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 0x707484ac910e477b52c6cc3776293869adc7e9426e0c7da99f3da19913f77de4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TRAIN1300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf77c88aa7deb31d99a02aeb7e2abf0e74772a9548b841d0bd31a008b409de0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TRAIN1300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb39293298712bf7f845db95eba2b75aa610668fbcdd53fa2df3ca9a8ac13049. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/TRAIN1300027.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06edc71f85a3d7527800c324bd7ff3e4f2adc8b56577abb0fd1ff94e6a6180e3. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZMEP2111817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257a49112618390b00383dd6fe6ea5d595131aa0e399391b6ce8a6422fe4e189. 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/QZNWW2134264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257a49112618390b00383dd6fe6ea5d595131aa0e399391b6ce8a6422fe4e189. 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/QZNWW2134264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f8a164aad96b685d49ab4079b41454d1c0befc1d7edcb8faf2e8153b2e3bf8. 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/QZK6N2200891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8891653c28f87df9a4e2f475bd1a18c955ca15442f70ce6a1807ff1ed98d289c. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:54:03Z), 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/QZK6N2205725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1389e2fc74a0ec0c831628c75898f63da3049e40e26f0eece34d0e8c4c07d6. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZK6L2209932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7762af6dacb7cb84434c14133b6c36db4ff02e12e772f5fb419232c306a56474. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6M2279933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b82feab8f369d7aa32e6d71eeeda4e8c4450f5266586cb6bb4f287c3979ddf9. Chain 2 (Bitcoin): anchored in block 957826 (2026-07-13T08:56:09Z), 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/QZMEP2344058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b82feab8f369d7aa32e6d71eeeda4e8c4450f5266586cb6bb4f287c3979ddf9. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZMEP2344058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6aa25491d5543cdc730e52c876149a71dd7d0a0f86d0f2428282090777defbc. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZNWX2324951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7589892532f8f13df39dfb6696db9a36c061fa33c3c66729117ea4b53209831a. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZNWY2308954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6bf64831bc410699b51211a1f7f1f855367ea198af62521b1b9c335881ff42. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/QZPLS2343815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c409e91ab42c66668cabe4fc035fc96febb9ccd75f93be2db1888efe1dea9b7. 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/QZDA82484876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352c980d105a8ee63388736c501aa9fa3f6aee1435255da41c2bb81ddf6d7650. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTAX2407338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512fffb3daef40ce95d2de0836899e168510d90550c419aceeaf6f9f7b34aef5. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZWFL2452529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b3172579f183fda6231261b542c291ac61a235f20f47ff62adcee83464a5a2. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHNB2599555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40dc45dfe785c07751ca807470325e8de397786e281e10b4627824d917b94dff. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TR0151500910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b215a5433c911e929321b3e795732ceaf78bb5912dd623f859ade789f7b68a. 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/TRA162300283.