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 0x020780b005aef51d72de550e3cfd146404cc325097582cc808668e8f1cb9d89b. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c46c6b7c-9ca3-41f5-8fb2-5dd303a20dff.json and https://artists.proofprofile.net/proofs/artist/c46c6b7c-9ca3-41f5-8fb2-5dd303a20dff.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 0x3297ccbad8eda41532feb27d2d69c5aff85a35395047e422628f3610f1d5b78c. 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/QZPJ32184386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bcfd6a27b9c81bb6736f82f9ca231ea620b272f32837b027b51169a7b816e9. 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/QZPJ32184387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b851778652088a256257946a826d8b4b1e01d293788b80f1292c8081a30832. 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/QZPJ32184388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16932705e56f662fd21b8ee980bd9ff38c93f0aac83c354a810a576255702c7d. 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/QZPJ32184393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841efdf99c9b0cd8ac2a0c0d1399b3e60777008da488b1e7fcf0dcca8b52cff7. 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/QZPJ32184396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbae44d85cb3e834550a0b978e89129984e03e139c0684ce31e4dc74193163af. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZPJ32184383.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb705dd2736ae366169d73e2f3260f2931df255fd470f91cd7f78dd85266cf6ad. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZPJ32184384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b69fe93773dead95fab9f8d4ae5384233b7a55f53fd1b70b717cb3fb14bc477. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZPJ32184385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed58e60e8d244c8ecf7ec6ad07e722929ac6bf63208ed32e053c96bbc322767. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/QZPJ32184389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81f4f7c21ad4e6d2db66c0d94e1060ae37dce43995937f2c1a2467bd18d184d. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZPJ32184390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4394fdf429a8b55ec4f7acfabeed64983e58b2cc4a646394b1100c0fb261d05f. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZPJ32184391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52081ab6f6304e0dcac1e8f4141760a87bfbcc2768a0049375e2b66028e6238. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZPJ32184392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b678dd0fd844cbd2bf9414f862d5d98e564e7587f818a13315b5252f0a5d35d. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QZPJ32184394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102b48ccd2c8f86430cf300964b8cf5dbe96eead9510885951306ea807c2f715. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZPJ32184395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8630d8c06f052c178ef507d098a23c780536e4e475c285c6c3fc093b8bb4a83c. 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/QZGWX2160804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42746b5615c02cb4e0bf19e8eccc9b03aec41d6a3b6549c2e4b4731c98323c8. 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/QZGWX2160807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa8e7fd91d670b3e678b6fc9995f37b2252cd300d7b7097cc79e1a6de992e0c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZGWX2160808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7236d30d0ebb276b3bcca1e558fea8989872528d808fd33d450d09dac7ab28f6. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZGWX2160811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45403d60f2dfbe3be8159ecad77356b70b1f6c489136e90a28a4235e108e11a. 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/QZGWX2160813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedcf2d2b078543b829aa45b08f6d6c90d63ee5939be537e91111323ee46c0ae2. 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/QZGWX2160814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e59be4145d73aa74b3ccbbcac19b3b5c902bc8406d4f0fd48c377978bed04b2. 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/QZGWX2160817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3adc7cf058d358e67d1a4271e14df54d2da67151b9deffa73c8bdd1ab6574d9. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZGWX2160805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8571d8504123e3cbfb5bbcca9f1ea39b07a6dedde46fbc138fa6e790c39646. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZGWX2160806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0520931d826abc16afec43552c796e7d2f5962c268c9f11e954bc165ed71f1c. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZGWX2160810.