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 0x3369157dea2525eb419a174d5bdc69fb1fdc677e0e46066fc8b8a470eece676b. 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/4447d658-8c68-4495-affe-e64136180e46.json and https://artists.proofprofile.net/proofs/artist/4447d658-8c68-4495-affe-e64136180e46.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 0xc54706b1a881463ebed5e6bc030485f7efc3ce8f9ff8f9f6a49ff38e38ef09b9. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/AUMEV2439014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f374adff729b9e7d28cd828fba308d95b1cec50f9175aff01f5e4b070eb210. 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/AUMEV2410299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefd4c2dc7b68e430bc814c1223a9ac5e66a2cb9d2845dfa0da82cbf5e697ccd. 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/AUGBT2326725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd0960b9e5c567e0875c3e253025917507885ffdf7a9faa4e53349b908a9413. 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/AUMEV2393643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c70592fc93587b7bb3a161d73e260ecfe7e54c9358ed7785a2edc006daa0d9. 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/AUMEV2371062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d38416a3f50a187ec29eae2eccc3e15f64e90b8ea779d5e49ad5bbd1de3bce0. 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/FR10S2369604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55de09c97365f14736de230dae6b4d8e507fe62fc3c6f4ae4d3e06a326a25ae2. 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/DGA052227613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7e88521d052d74dd6c35f51155e45cde1420fd93ad1867ff22b43b84c06ff0. 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/AUBEC2187196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00744e469358568145d8f8a83e171e568eff9eceb85392fda8f7211b8d188e3d. 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/AUBEC2176979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55de09c97365f14736de230dae6b4d8e507fe62fc3c6f4ae4d3e06a326a25ae2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DGA052227613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7e88521d052d74dd6c35f51155e45cde1420fd93ad1867ff22b43b84c06ff0. 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/AUBEC2187196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00744e469358568145d8f8a83e171e568eff9eceb85392fda8f7211b8d188e3d. 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/AUBEC2176979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00744e469358568145d8f8a83e171e568eff9eceb85392fda8f7211b8d188e3d. 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/AUBEC2176979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3e613b21e1b40315455adb616ac46cb81ecdcc263de8f7806b49f50859185e. 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/AUZEM1801011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9fa58dada3f52e55d7a7317b2d7b5719ceb3b45b5a4481c1452290de2fc4d0. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/AUBEC2107251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3921c99b33ce9a92ec8845af870bdb970db53f0a2e4a6ba82417abed6e76be0. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/AUBEC2068353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af1bc24844cd3605b8f3431e0faa7b6a18605227bbc8c6d38639c153256979d. 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/AUBEC2039296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc529d47ef72a366db4dac70cb9016c3206152fdfe85629a6d0e695bef55210. 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/AUBEC1919873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c845182442530919914cbe3b941bda65097e662f2ca3dc1e674fb367b8a5a3. 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/AUBEC1913025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643ed22af63a9776cf24dad63fcf068b779502a64f24a186c72e8b6ff24751cf. 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/AUBEC1927703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c07ce1de6ee985f5e5c1dacfd81bb8a02ce10a769771605dae236105d98e62. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/AUBEC1927715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a55d88f4addc85cbc4d09135af7432f646e3fb334b6caea0a3a29336a079832. 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/AUBEC1929482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc529d47ef72a366db4dac70cb9016c3206152fdfe85629a6d0e695bef55210. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/AUBEC1919873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c845182442530919914cbe3b941bda65097e662f2ca3dc1e674fb367b8a5a3. 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/AUBEC1913025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fff8bae406c422ccc027b17a1295f2b007893dc00d3cadb2703add7cab7f84. 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/AUBEC1901795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed066a1ab2322f701424923242f34e9b636a44526426f5ff04257177f0b9f05a. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/AUBEC1831478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131c72e0d61b5e821490d757501da42e1042cc2c399743df1b155770bf326730. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/AUBEC1718433.