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 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 0xf97f8bac383f0d9e784988014ed461ea44614a71cf0bc8fea1f756942c5903e2. Chain 2 (Bitcoin): anchored in block 954062 (2026-06-17T07:39:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46bf0fc4-f4bd-40b1-8c10-42c01534ddbb.json and https://artists.proofprofile.net/proofs/artist/46bf0fc4-f4bd-40b1-8c10-42c01534ddbb.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 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 0x54f5145784ab55853a8e5d28b5a4aa1ba0d307c0ef34434b287ec3ef9407bf05. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/US82P1200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd263dc33dbc83a1fd6107d3a7c9ee227c27cd8ce0d26b6800314c112dd21a632. 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/US82P1200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0d8944fc96c130f7be32cf84632deb84adb9e401fc6d25254a2a6b3c3fa7fc. 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/US82P1200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a58c56c78f6044f16bb1a6127af73fd71c0b0a965070415fe731c48afba200. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/US82P1200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb74b8f4aaf897e63c570a42d3ffaf7cd85dc632e4cd78b6e489fca7eaf0c21. 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/US82P1200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e53cc660f820d2474d714eaa837abe067d3b4b3316a905110885f249ed8af0. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/US82P1200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515bc5e1c07a6366727eab2442f3855438e6aacd1c1f73e50ab75eba50c6a283. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/US82P1200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7c4f42b3eb9f7a4c86ec5be477c6c95d70e9860ae2ed2397278fe36cff90ef. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US82P1200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbc88729db2478a10c554e1d9e1d67f454fd3cf5d9f9316135949b5c81c2a6d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US82P0610016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334bc53323294498d6cbd324652ea95e9a0431205e5793a503ef05b49666a890. 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/US82P0610013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c141a83a19101656dac86e3572fa4bb54fd5c4fa3eedcf8a647987981fe0989. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/US82P1100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a2b00d2f8d4e50d7027ce9fb1b904a906b55bca67a9447fcfce36462d2fc2a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/US82P0610003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620ccbd458c07dfdcc67ecf120da71ae7ab9526e363a3f03586582130b56331b. 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/JPZ920607041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb375f5a1215925d3565863588a5d9dda1a1a20bd6b7ad004e52391d284cefff7. 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/JPZ920607045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8562514415ac525d23879b3e02c05cbe778fffc6d0b4c871946b4da6bf4fc8. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/JPZ920607043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa939ade266ac98461166020f5098fa84e230609025e4bb4d4f60e7d6088922f6. 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/JPZ920607044.
Peabody & Sherman's Playdate - Dub Workshop Vol. 3: Spacexpander EP1