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 0x225cd6b9e740c0b80feeaa4b72e161f12bd7ae2741dba3b46708b1053d76d4e5. 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/a4bb2582-6916-4658-af0b-c6769ff9f4b5.json and https://artists.proofprofile.net/proofs/artist/a4bb2582-6916-4658-af0b-c6769ff9f4b5.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 0x750554dfb51ea09687c451bb32c4e7f9f020bab3b2866c78edfd751da5ffb832. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TR0860640615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18cc5946ca63d5c7d1ea7e7d5acfa8f5e63680a5297c2e48f33f1f1330448130. 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/TR0860640607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0304672241dff52b33a28a0db26ce69d65490a7d6be708fa4f2f8b50c97e0d. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TR0860640609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90860e4e7d14f809fc03d1ec07899a2c6247de87511b3ea8930b5865c5efef5c. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TR0860640614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2757f4d59d4c59314e39e83eb60ed33da05367a10fd9ac5779e868d65998f0c2. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TR0860900936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c0fe6f74250705f0f3bd0415c4896c482bb6bd39f9ac2ba627e7bc480f0fd5. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/TR0860900937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da62ba81f25a3705c7165eacbcd4d6f52e0ab1e7b0a63b15cae8183cdcfa8d7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TR0860900938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8bb6461012003c5dfd976b00326baf4783738890f7f60518b3f4288f1ba282. 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/TR0860900935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2d4cdac222cc10d848d60b44989984185a1c93ad54e4f2b0dd69d9bea667e5. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TR0861301357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd87c1d2d171efce44465aa20b5371e3f00983e036d9925077acb921e3fd971b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TR0861700066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50412f4b41026ce0722001295853a5ec05db371ec655e048ea1171201264935. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:22:26Z), 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/TR0861301360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6bb987e01183f943109491bc327d5d9b3c5c897d8844efd24cfa86cbd7afb47. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TR0861301362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bb66651f1bc280dc0fe0c8bc07b4f01cfe54b3feac4ef88a16c4f04e6e3999. 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/TR0861301366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586aa6413e417a31a54266650777cad2f6fc2294ea6c72435edd8e193c846d20. 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/FR59R2239310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e061ce16794872654d434fb96051df39af5dad0f932af2a9e1a87f63de2f444. 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/FR59R2239313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbff1a70e51a4d16d4abef60643d9733b52c524476de54c64d693fd0db695c4c. 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/FR59R2239316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ac028175014d315525dc770a64d2577c4ad060479f629a98c072ac31c7161e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR59R2239317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8973e35f52aa1cc54d0b4fd19fa01a44e65407775f852c6f40bf7095c84ea70. 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/DGA0L2364184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc89b420954f83aff87471ea8296bb2b4d110227eceb57a32a77222f29620bd. 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/DGA0Q2394100.