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 0xf5fddf690418974a8cd7318b300f5e529444c1f001acfa43bca04bfbb914480a. 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/3a2b5af1-e6fb-46e3-93ae-0642c258e3b6.json and https://artists.proofprofile.net/proofs/artist/3a2b5af1-e6fb-46e3-93ae-0642c258e3b6.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 0x2d46cdf462f789bc085354ba316fbbe68862d0e178392305dc87c9b47d6da46e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBKQU2561268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0317193e0e490be2a0e341fe4032abd54b143b0b41d48bc4f8e5b59e078a90. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKQU2552840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ab0bd4452019301ce7e47e803c3fec2aa96d93bca4f15e917c5015de1f76ba. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BE5KW2500835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f765ee5f90efcaefb2eafcb7d347143352a17badb740d6634188731858d6ef. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/FRX452548919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9614ae099fa5887cc373278b8e6b61ce6000565333d8a195de045dbcc2cb4978. 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/NL1ZN2503604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebefbba4864e89b8fe046e9aa1ccbf1cba30621cd409020199bf0d4c173e5a51. 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/US83Z2514324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921ec23e8cbded22acee26cef01ffe5aa3a0730dbedfb6844a64db2efbb9ec96. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGLS2540297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe633e6f9eb11f9194c7c3709a05beda4a1b4d81f855ff7d18981ffa803e3b10b. 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/RUB522501052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c680c711583750b64b66755857ba009364d02f728240651b8351ea084df5c4b. 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/RUAGT2490478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167f87bb59c3a2cdc43260cbcd06a911b5dc4572f2a4c6c7f8c154d33817c8ec. 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/NL1ZN2403127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5169668d3338441fbcde856b630821375645efe67fb09fce7ac46df0671e42. 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/NL1ZN2403329.
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 0xf5ff7fee419c1be94821b979e7cd9404fa28cf80f5388464835100b08af50fbb. 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/NL1ZN2403106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b101732e3cf1f5bae83b46edf8de3cf9730e68811d76279172dd2f81921f56. 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/NL1ZN2403105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59af60385dcbdebbf73ee0664472202fea30124290eb8b20665f4da505500d26. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTV32445878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f94033ff2e5fad073efc76f4682fce89e0ef5b733cf25cd491cb1e5329d45d. 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/QM6N22409765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed0e36a5058b036ab872349df2ad7f3921c0dd1c234a4d1a711f8096f8d17e6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GX89G2436961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2aafe680fc8f07cf2c6f5f04dfd58c3b2629b46b244fa10da4782a6c661afb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMHL2293233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc88ce3f11c0f13c0d6fecbdc8a662fc62c63043c53270a049ba293c39f71ce. 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/NL1ZN2302522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bd8cf890fba5bbc5d0e420f1c3f11f50bac6732b966ce365aa11cb6b94c421. 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/NL1ZN2302523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c28ddd93554a335a29f7d76b722d47f943d14956e03f022e5a855da5fd9484. 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/NL1ZN2302496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b3493707db7af91721ca7bc4da0ea8fbed82add650d06a3e1083e7a01c0c53. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL1ZN2302535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc09c67c3ad922db7ef04e2b60586ff1e165874546a69a4c5ac3ace455ce01f. 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/NL1ZN2302406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f203ec8e3fcd905da7251fe2efc9f841cd1a5c5c3306f523b9ba59a66467d31. 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/BEIW12300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca1a8daf309355d7751a0f4c79517a99d5c904a4a9420eb9eb0f55b6546e503. 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/NL1ZN2302306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd14a6153393ef574dae90974a5e0b75ccd8e197627ab79ae54363bb4d1298b7. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/DEU672300618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0ffd270ba441c43d7347df3fabbcccb4b85c21b5c9f1f4196a803d22727f4e. 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/NL1ZN2202032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f3b3da7f3315c0ae9b8f25e3e892a247dbdf12d2f24eeaee0c9cd641e494aa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NL1ZN2201644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02912e2afb28e6ec9aa2bdc346ae7f37094c17c142094f673384b81235cad53e. 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/NL1ZN2101555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d847ee6b4300dc36cc30344f934791863b078f02aad48dcc5d946b35114fd1. 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/NL1ZN2000296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785785d8e92cbb8de513e8a59bd0dbc946a427bf62b052e14e42642d4108b44c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NL1ZN2000583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7367babeed24d014f0650c6c950efeaa9964409628bea9b7eb3a2f8488b4f78b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NL1ZN2000864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348f36c6d97d7598682e928e9eed7e5e5ad1fcb9b52ce9048f5c9a68b79df139. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DEXO32048744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37be8828f32d80e880e4d67a40db57201f650e8067402ad1cd8e2f9f12843f7. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/NLD682402401.