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 0xc8f9b698bae34920fbd17a201bebe8ec98f772c57e75299f2c907e3b6aa314f6. 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/f8964441-0740-4884-a19b-c2ff07ab0029.json and https://artists.proofprofile.net/proofs/artist/f8964441-0740-4884-a19b-c2ff07ab0029.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 0x9a2d1cc124a4041991a407835f5e03e1ddca30ae9890dc178b062a6f2854fcfa. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T05:47:42Z), 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/USZBG1115886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89f9aac251338be33de6eed72d7f5ddb8ac1271770b27807773b4fadd516052. 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/USZBG1115873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d991b76c05e0bc9324473876f57e254134cc9c5bee94363b99f6ac7be191e3. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:03:51Z), 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/USZBG1115899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbccc13ab42bdca8ee518a364ad62531980a58f6f4d80fe1c7f7c8655119e9bb. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:10:44Z), 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/USZBG1115900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08088b05b0f7c84b7e19cece64aaaa4f0f4477e6db78481cf3aea1cf03ae2504. 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/USZBG1115883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712f8c42a7beedd40f2599e5315930bf54a480103bd58136c8b66e9cfc2b5b10. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/USZBG1115943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12c284d916dd6184c90067292adc92b4eb3f68cfc6d5aaf04fc931dc879a579. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USZBG1115930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea41a8655eb25db594e9fd0efcd76f7202cbe9ce2aae05c068171b70e973c08c. 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/USZBG1115932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf7bf06b825096d76bff9028d6acaef7134752222cbc2b92829ab6738b102b2. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/USZBG1115939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bda79eeffb61d209cbfde08dd5dc8bf7d8c6027a5f1b4deffa842a81cf75601. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/USZBG1115909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8150ad764277473439865faaa3c1c3b138239e27f04ba3d3910cc4c5db8238dd. 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/USZBG1115911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce1151049fdb0d07422351f14a18ce310a468ee60c2cb37015702292e02fb80. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/USZBG1115914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3e71ef5badf6dbc49404b0dc7617408ab3c720dc52f49638e7d65309b2cfc7. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/USZBG1115917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2aca097770d1920b687f08f53ddd051063a5b2578252edbd6d57f58852e3e5b. 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/QMFME1464955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef60742498c837a90513eff8a0f21cdd7f4f6bc06f0454e9c4f583ca84458a1e. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:22:09Z), 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/QMFME1464956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5b6a9270a28453d528ce37191481746500da8e69ed0b6e90aa6035ba6f8d70. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QMFME1464958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861e7c377ed42aebc128c7e172eeff0a016eced74ef562f394ae95fd155a7785. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QMFME1464960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797884ca534c798b16c36d00467058f4f6d58c22cef46201b77ab3fb844d51ab. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:41:01Z), 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/QMFME1464962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8993e05ce826abc185f94aefba77ef763d4a7ebeca6335765a1a4da6939a436b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QMFME1464965.