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 0xa9a3ac2598b0ce195607948a7207e08284639d7bbe4c32f182bbc332a3233687. 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/c93778a3-d1ea-4d54-88ad-a639412be33b.json and https://artists.proofprofile.net/proofs/artist/c93778a3-d1ea-4d54-88ad-a639412be33b.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 0xfbc86bec545830ff376c9521d6367a35c2258f5b02894bb27476c588f4914044. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:22:27Z), 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/QZ35V1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f324f4585d04ac2c75ec3f76434b090b98c41b0efda63423eaa8c8a476a7c6. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:16:46Z), 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/QZ35V1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd408efeddca9be252f4d218c982c5a8e049fd9f07b16844307a7a1ac113771f4. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZ35V1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ffa994fa7980c7c174865f3517edb38905f78edc9a09153002745711c32717. 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/QZ35V1600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae300866756ac7161f8738f1209d8c0c13fdcf1dbe1d0b17fb4e81ff7d8938e. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QM3861707102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70684b5c2a9a85c272394f9fbb3350e103f7d1b74a566af2b6d2393c87ba810. 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/QM3861707104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c09f659a1c0f0c097b5be1d718827ba562e91c0419446e3c3026a1c6a0742d2. 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/QM3861707105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f772cee5f7613e0adfc32ee0024515a0422597d3b9ec0a08c975bf1ff579929. 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/QM3861707106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b13413b604e4e86af65d942b7019624dae12bcf49a1a3bf953e4ea0351cad9. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QM3861707108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6a3224b1007d44085d9cb2c1300bf549a8025a7c494b86f875a09bfd731c6c. 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/QM3861707109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0ada86e7ed4e9370695a1c8e479fbd7c93ffe1aac343e6b46a6b6809128cf1. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:23:13Z), 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/QM3861707110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebc25c61a335a718f551b07592e02d20178037c638ca400cafef3b159d96cc5. 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/QM3861707111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3431b9ac890f9e84d0f0aecc9aebac5352052235befdd2d44c549ff91d63b079. 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/QM3861707112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c352161e89502cd132af510796e89e6b05a4fbcdac3999d17cb8f728a007af6. 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/QM3862009807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5086361402536edb51745474f9088586be3ce9ab352d7acd6ab0c1b24687aa. 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/QM3862009808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c86094112c7e494e04ffb32112ea5257988781a1a5e6ddfdb372fa2ea9a8da. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QM3862009809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555f63fba573c77accf8daa4437719e1223bff9a39bcfce5434b9f6508d54ccd. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM3862009810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc187659ec6f06bb0576b5fcb540705a3025e7d2376cfed8c89a659ef9e6d2c3a. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:23:40Z), 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/QM3862211202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf601ea4f5d675fc7f5c1f24bd446a05bb9e7294932f04bf5ed915f7538ce6d09. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QM3862211201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc187659ec6f06bb0576b5fcb540705a3025e7d2376cfed8c89a659ef9e6d2c3a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QM3862211202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0173b0abdf9851566cc4501cd3294676a2630f179b5901c5da22ccadfdfb302c. 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/QM3862211203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83a08f61d45669bad8a5807ebea440dff11d83dae1d4e7d31c654dfd2bcbfea. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:10:21Z), 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/QM3862211204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf58384d57af8bf18bcc012ed97bfea69380fecf261d1d4c5e306dd273ef19e. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QM3862211205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d81e3dca87c22c83d791a6570aa493eb67230b1e8e4f0ba14b78d317ac954f7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM3862211206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd9b968deb59af28e3a621df90d0bba5622ef080b0fe7351cf4e6c2d1e88e0c. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QM3862416504.