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 0x4c4f4f55af415ebf054cbc7e7e220761bb844381962fa353c001f3a5b0cd50fd. 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/516d4282-feb1-4096-b60c-bbaabd3e0c25.json and https://artists.proofprofile.net/proofs/artist/516d4282-feb1-4096-b60c-bbaabd3e0c25.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 0x1d6a16df841ef53a6cb84445c0a7f6c82272fd7d3f9ff44fb32afc0a681225d2. 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/USSTR2219802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f1b11cfa7d695bc267dd0979693b6027dff19c1d8bbdd243a2a9966102fc0c. 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/USSTR2219803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ddc7d38ad5db7f60f3dd9b7f0b0228135874baedb2802ab6f3fefa1893bf88c. 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/USSTR2219804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd7ac8f1b4f9ca16050a90f171b80bb15c5ff56478ffbe31ed539083169791b. 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/USSTR2219806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94d375710b363f187fb2a1f6bd27eade8439117eeac9c4098b2d9ea0eb1e6fe. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USSTR2219807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29598cc8601a374eee2121e3b0484d930cb7c32b7a5d83728c73493de9da8037. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USSTR2219809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f3c6b723099afaba13939585ff0b5de4b0ad96c5702e90126f02941019195f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USSTR2018801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dc852bee474064fc87fe90fa24b118ce00fd11a84c8bd4531e63c70d111e1d. 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/USSTR2018804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8cff628cfbffeae27b9f3c7c887f203606185e6a1f00ad2ef89888bf8627935. 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/USSTR2018805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1688f93a1520c3a38a5b5382a510d81d4f8dc3bf611d7ac22539e453d432db. 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/USSTR2018806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975cd4fda0f83e8b93e50241a02cd04232de5013719e3791ee85fd1af59eeacd. 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/USSTR2018808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe419d075dbfa8849a988424c5544b7dfe3bffdfc920e469c20bdc388b4bc5e6d. 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/USSTR2018809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1df3c0590ee583d830a0af7eda53593c2ef419bbae263a8fa88a5c510f6dbe0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USSTR2018810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed23527973302d6954163de1e146b1272d75cfcfa717d42ac93598cc051b0de. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USSTR2018811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe989695e0ad4bb0faeb880ce70a6c3e51c586e229a5769041c422fa0f025e4aa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USSTR2018812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957ffe219272d9205eafebb1cd8d3ca4d36a430eb887a3f97dbe036b92989978. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USSTR1916601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccac6bfa8941916bd3c87670f814e75c1905529b5103b502c58d09453f3d52f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USSTR1916606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f284849349f9ff64615af811f72d502199dc4cb5220a66794609edea2c97bdd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USSTR1916608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c1cc367f38481b275f799a3330369b286b2cc0b3c588f818a8146bfde79abf. 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/USSTR1916609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8cff628cfbffeae27b9f3c7c887f203606185e6a1f00ad2ef89888bf8627935. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USSTR2018805.