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 0x2851f28b72744b70c87c327c1d873f509326c8cbb01b34027a1af140aa5f5cf7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d1a5582-a2dc-4395-8434-d3a1c503dcac.json and https://artists.proofprofile.net/proofs/artist/5d1a5582-a2dc-4395-8434-d3a1c503dcac.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 0xa29623720f5a36808ff4989a595aa6c76eac8abb4b665bf67255cd14d65e8653. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAFC2091312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1897af2828a0c7fc55e39c8aa8b4179f4e0a89f9f673647a1fbe12517133366. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAFC2091113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85632358111464b0618f2ba12b4b8ed51848185b6dfad66b274e9ddc43d43d48. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/TCAFC2091428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e24c45790d457ac1f66243a0c7bc162ae29b40acaf6122a6d037c31fd66a73. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAFC2091278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c91a7fd6aa317ea5a0e2e737e28e97660eed9e17f1aa485952a423eb086bc5d. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/TCAFC2090941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b03c37591bc084141963d21f500a0129de872a7326e2784f3c38d9d6b1ecf2c. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/TCAFC2091243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a6988cee79915d43eb9dcd36adaf788030bd1763ff1c9000de054030dea1f5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAFC2090959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298caf9c4632a55fb23380d39f36fc7efb8624220c576c40703ff79021681121. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAFC2091143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851c2c32b689906eb5b7292575afca9f892f9a5d00c8f6bbf5e66544d844839e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAFC2091012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7a6d9cd7b670b11cb47780335eec52437e18efcd8b47b7aa57a3ea918e2f0f. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/TCAFC2091524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2e395403bd9be2616d67241e5973d0ed345f04a276eec88d7cd4bae9f1504b. 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/TCAFC2091291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148bfda4d68f4f00ec2e0707e612f05139368d033eb477331b54300cd1773d0c. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/TCAFC2091334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70853fddbe324f69e2db51516aa774b779d0e51ed3dbf593b60246fb05b38ee2. 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/TCAFC2091465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe75f11b51e70c3e6bd56225d19465f031bd32a192d53b7adb078f273fb4a40. 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/TCAFC2091094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0a8a72847d54543d34bec797f1f8f54a8f7ce84c168fd7c6f9b6aee367e709. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:56:10Z), 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/TCAFC2091554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfaed629507af27e8a2a9a95538047fd86169b895472d2baddafeaf17433da3f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAFU2198875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ce8565b040fd23e9da79058860acdd210dcecc020bd7992afeee817c0a5c73. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:48:18Z), 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/TCAFU2198919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d55ba6af5356cc7e3c8ce3cae7a115e82daaeda3ff509403e8e666b4d75222. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:01:40Z), 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/TCAFU2198965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6943179689286249991c13158e776d17899ef3340f1b7b0a3334eed78dca97e1. 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/TCAFU2198991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f96a1aed7834bd6f1cb40df4f868275b8794f317f98480aacc53cae2bedb30. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/TCAFU2199106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5fc07aa74cbf765eb7a94f5854b649e53f3c9721b8ab68d7a7f5e2332b9c51. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAIG2411709.