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 0x63b7d5aca071cc35b547911f65ced38e6e354193aca70add71b93a2af6f78f2b. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af08408e-45d5-43fa-a321-26328e6f99d8.json and https://artists.proofprofile.net/proofs/artist/af08408e-45d5-43fa-a321-26328e6f99d8.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 0xbe0f4d7e031f8f89b9e74f06869d9b7385d1e3276b1770e3e07581d4a7968bc2. 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/DKATA1300802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0a4cbf5b3a774a612152d27b207582266e120ac7e59f9a971626721650676a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DKATA1300803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1362ef8dafbc10d153a38da8ede44efd25ca67e70d38afee7c9abe0c8e8ae7aa. 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/DKATA1300806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe928e704c7e5dd27fc1ed775993c39d82eac5e781d5a8dcda4e7cc4dcbf388ef. 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/DKATA1300807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc595d94eb3b8c74ba13c3571004567ae58e8218d3392a57fb5e88e19b514553e. 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/DKATA1300801.
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 0x4f2260363d6e3c3abfd7c401cdaec5b7f54e2f5b284edc4eca23c93aba398b66. 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/DKATA1300804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f8c486d7afe7d829870c41db18f21563691a9cdad1da556db9932b7a7b3528. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DKATA1300805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cb4f97ae2c909c635a0cfa28cd273623311adac01cb4c0f0b5ef2866f11305. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/DKATA1300808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0ebc76e98b180cd533e9e91ecdae658156f26d16ff3efb099df2658eb8ce34. 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/DKATA1401002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55bdf554623e183e75c11f57e7d912dbf470287fa81b108cfc98f52e2f7ab56. 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/DKATA1401006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b945a469f1fc041995f83845aa1dc240f6fd4f16cd21ba022eb72af6fd313e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DKATA1401007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebf84e33d0b544a1f7cc2cd51ce0970e8e06b16cc97557d7d651855b5bae110. 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/DKATA1401001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aad544123a350332fc4144cba13264cdd5793481973911b1f2b47c8d94c6cb9. Chain 2 (Bitcoin): anchored in block 960101 (2026-07-29T11:46:30Z), 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/DKATA1401004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde190f7e78b5c9e5455cda3657f67255742caf38c5e15b1f74cd94511eac9836. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DKATA1401009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e456051c7dcfbdfbadbbc1ddf1c8c9f34b7ed3db201826e087a1a1244fe333d. 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/DKNA22010321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77381496bef7dd5d0194e6bd87297dbd7602638f376e2c4d9d8a1993eeac0909. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/DKNA22010324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b90c8e6ee1055f18fda1c1ff9007a402674bc310901fc59a996e85923916edc. 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/DKATA1301204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2f88b2e18cc5c4e057d226a127eee1259e5576cae650b3d7f2054b01fc2140. 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/DKATA1301207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f751af14f068809c40da6fdc3cad32a43d25c96edfe1598e11c0306121a225. 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/DKATA1301208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ee0c12e5840a2c39ad6c580157fc4e889d4eab663eb81d39cdda5d276d2a3f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DKATA1301209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d77bd7109cd065482ac3f63ffd071d013c8de1f1011a2625afedffbd2e835d. 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/DKATA1301215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efd6973cccb2aa99cd7a201245daa8c27e7c01dd3e039baf5ffcadbbcba1b7b. 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/DKATA1301216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb624cdb6b2e4f29bdf9a0cde97f467cede203ea4575320e17b8790b24028ee05. 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/DKATA1301217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ba0586da2d6e97fa67ee54f16dfb318c046bbea98e2c8b3bf8b18aa242abf2. 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/DKATA1301219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55693bebc3297197b2fa5f98064df80ff7c2ddb57105b8bf40233a94bc8bc959. 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/DKATA1301220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e77bb3fcabf20d30d69a412447a2ef884716b6c641b838df8b43babb01d36e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DKATA1301221.