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 0x77d82faebe1a7ed715cb857f8558bd552c6d836ba49bb2ae9adab7a4af39436f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3c388da-dcc2-47cb-bfc3-3e78e7a2b433.json and https://artists.proofprofile.net/proofs/artist/e3c388da-dcc2-47cb-bfc3-3e78e7a2b433.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 0xe002c9658802b89790364306112804a5e35bdd3dca1db2417ae9cc3e069e4e01. 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/RSA131350907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc787830e75e9c322cf32e8d2d9ac0eb76dd6d01d1b303f79a98c92a9c57bc940. 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/CSAO21231602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8bf597e670f420610964098bc71466556b3dbdf7ee467856785bfeef1220a8. Chain 2 (Bitcoin): anchored in block 957633 (2026-07-12T00:19:47Z), 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/CSAO21231605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb06df590486edac2e6e6ba7e71383a1109615eb3b895efef2b9b1efd5a1d4d. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/CSAO21231607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7ce4da620ddc89633a15afca01f24f92af67bd15a70b6f1352478af35cbe0d. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:43:22Z), 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/CSAO21231608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5963eef51a071032ed675c302ad9d9de2a0ebc7abc752d22e41dbe55d8fd641. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/CSAO21231613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8df7f93c03dd3f652655a791ab71c68e4c044db941bc10b9a2f0da4fe058cc. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:18:33Z), 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/DEKB71437108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b5993835abeea0a0b5b52ed2497af8aff2444ee30c1cc81f5b595df0c45e07. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DEKB71437097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda869e1e3386e8e27274c9c192de809aeda70f3b9ec39bb26007ec818b1a72d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEKB71437098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fbc0b9992f5bd81536a9adae4bf151a78e0a25c54ae5607dc9e66218f84f5b. 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/DEKB71437119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39b7629a6ede2988b1d8b7d8457305a10eefa9d102c530d6ae9f490f49abed6. 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/DEKB71437423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd46512001461dc526670df3b4ad2afc4e67b00a19e0488156ba5ef88b66e12. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEKB71437424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81eae86d695aff0f37c4649c283f1239204f017aa355f1663c1ac416dd80b72. 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/DEKB71437426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f171612d0109d4721218f6a008edc37ff2bc0492da562cebebfa9f80ec60f5. 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/DEKB71437427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ca18bfd3d144144766937dcefa682dd3ff6e75b43a9fd2ef147170644e8d85. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:07:53Z), 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/DEKB71437429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c94b5e7e22c49ab1c2f3d3e1cc75715a1ce9a5f44c6c5e546f8ad4f72e23bd6. 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/DEKB71437430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec07265f2ee30e28ba037e8083752c3d9335a9c49aa8f70a2c2ada065bc7632d. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/DEKB71437431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc35b2d72e6ad737e5af8c9cd9e8d92e85bf0f3b0bd1a9dbc60390af0a0e487. 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/DEKB71437432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e73fb4a132ac1a2c75cc891c0c2d290f48bc67f2e5a33f2b75c6ad09bba94e. 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/DEKB71437433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809282a50721837860097875ef1d621a9706d8be350ffad2c4fdf7fd52f555c7. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:58:19Z), 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/RSA042000322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce294de031df9637c761619cd006e2f4312b5120f852bfad6634b6f2139c94cf. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/RSA042000326.