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 0x3970c21ea5404d985cb780ef90d484cf39f4995ced3b30dc1b696e4caea96aa3. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/49d3072b-49cb-4281-86b7-a6e49982943e.json and https://artists.proofprofile.net/proofs/artist/49d3072b-49cb-4281-86b7-a6e49982943e.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 0x0d98908d151c303bc2eaa70741443b6eb03fe6fe4d2d95d55dfaed288175a21e. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DGA0L2378792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ea29a7f32c83548dc6022bb8e10de1fd6a7a0eb3a5daff4fd4f51ad7c798bb. 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/DGA0L2378790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4636f2758b2651940057c993260e4db11ff594158c27e96d54129a104b1f6160. 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/DGA062305780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12a3945b9fd37cf952d120f70e5d3c66591c6268dea844bbe0d20c833158d41. 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/FRX282347409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb742d83aeca2650a548c22032087ddd31a0d74b94d3ba2f515bbdc0ad521b2db. 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/FRX282348021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810c4f4a47d3f8e594b660534c22c710ae93b27f0522d086d36dfbb91c02b20a. 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/FRX282315122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df10ba17b50e35acaf220ace2eb4ea18859453156d31d22028e420bc34bb88d. 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/FRX282308411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6480fe43b1a674a362cf72e11f3c030ecdc4f8e80633cc2da4828b2e23d67f4. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FRX282308419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54b77011ad30637d49feb58213a5fefcfee4612d9602ef42ac327d091a7662e. 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/FRX282308472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70bcecd48a8af738dcf1a0b49bbd890080f3c77b25b0cefa07a2bc46099c8d0. 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/FRX282308487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53b5af8db2294d4e80e8bef09b345813fbb2a7746c21cbeacab001bd3a112c5. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FRX282308486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2426b4a522e73318788fc926d7fcf0426234f243886cdd2fbff9d961a384e6. 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/FRX202360989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ba8d29c8a60be6b03c71025b5ee54625e3e9e6f878c45a997ff030fde74e3e. 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/FRX202360991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6b8e120350b67ecd55f7cdda6be3d8da6bfff05851316752683e139e898bca. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FRX202337154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b144407c1344953d7b68ac0277b66f3eb372e53a231a8d11b0cfbdeebdf58d0. 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/FR96X2377309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00d76de434278822c4763066e7fe78602ee68c6a8deeb2e6abee09d5816cf34. 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/FR96X2377163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90a1a853d3ab47b0398050ab423866ea076c323f7b043896c4e3fd8bd2508d3. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FR96X2377166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a569a5fc58d9f483ea0e0a81d4221a29c4d59a2d51aa39508cf80cb5eb6bdc5. 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/FR96X2384311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee425e18dd40745d1a853a40894d1c496284f8cc4963dad81944d9193fec021. 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/FR96X2345957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856de3dce46b135161e0178c773b43b7de4d9c29d793dba05ae23357c83df58b. 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/FR96X2345959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc216ceaa5ae182986343a5c1713196276d71c1f9c3aea42e54973d6378f3533f. 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/FR59R2323790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00624e64b6155ddf93be662d8b4fce78c3ee6c59fd470f91c2ecaaf008adce32. 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/HKG732262817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992445853cc5b1016bd64371d63231566e969a1a4ac3406aff35793ebfa06ce0. 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/HKG732262813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39635221530cddffe44da1d25d478eedcbff419b70a66a849197fac06e09e12. 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/HKG732262815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf54fd5c9a2f5ac620d7e2caa244a9f528b8f4c38b1a2610b4ad2aa647fdd16c. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/HKG732262819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2718ae9c33d29bda5751a7ad6f5cb9f03f81a044b2c051075f9de152bceac409. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/HKG732260821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41efeebb3375a38035dc5f42d589a6894955380cf6d9ab94396bf9164c515ca. 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/HKG732260877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77127ce04f7efbcf9b022860957ab4e7ca973a792369d8ac67cd1d57ca5861f8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/HKG732250589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff3f9a4cb53130cfba13b71f6b55d89d236d35ffd75aea9325a334553c24ede. 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/DGA0L2379909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55407a7e6a7ab5a6a0d9e5a7a502ad5689861ef7648ca9c093408b7c8a7db961. 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/DGA0L2365583.