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 0x0137948ef16d64de3d7b70a68e111d63ae247cc7bdb03ee051b1bd55a4b57cbb. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31d56332-f419-4f3a-800b-89626f70bc37.json and https://artists.proofprofile.net/proofs/artist/31d56332-f419-4f3a-800b-89626f70bc37.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 0x5f53aeff52a3b7885ca17e34e40895bd2cc8a920d8a0809ea4b37fa42ddb0a1c. 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/GX3Q92172621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550279aebdc2b02536da099dfe1dedac2c9640e7eb99938db20f0624b8a010a6. 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/GX3Q92172622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39566f03bebdd6a5aaeeb23ecfbabe9e016668452419b7f932a13758694d805. 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/GX3Q92172624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1943f500003f5b3c7b30d2d485e397f2b34db66ace60023fdd72d5569faa121c. 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/GX3Q92172626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455aed943034bcad59bf80fdb2b86b48a25b3cd44e65bac5133849e372b72d75. 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/GX3Q92172627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102ba3282379c20551fbd13c0a1fa1d6df536d9aed2c4b5f622c24db2749e90d. 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/GX3Q92172620.
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 0xa6df254900e56bbefee31a8b3f19c02d26551639be5fcd4c809c34fb23940779. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GX3Q92172623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f280f0cb1f3fbc42a661f15ef7dce7adb4dbecbea0d0a1d371cca94776c2d56. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GX3Q92172625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ab45538933ca4403dd3982397cad14a5cc71ec14cb7aaf99fe926b10e7f0bf. 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/GX3Q92134792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4a66e4d4fc38e162c4079dfa5c40b72bb9c9ff32dcc2c6ff23b82c792e0279. 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/GX3Q92134797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2073fa78eb0fa03846010291f4030cf70f429fcb81d1e9c20809ab7bbc542d6f. 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/GX3Q92134799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a04e520b95c4c5cdece96589a9d1a0ef9bddf0bf4ca09e4f47dbc5e1f8a6817. 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/GX3Q92134809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602a9c2482b876085e1303690563de2179a280896e626842c4525a9a2d7303ab. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GX3Q92134801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9979a4db3eff50a6ef31209144ef20fe28c1e59b56056b4aa5ee60eef023fb92. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/GX3Q92134803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c03775a213f6eac810299f190e1975631ad89430c0bc49befbb994dfa527aa. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/GX3Q92134806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13b1ca2a329bb0fcf1f157b9c7794cd7841639cd57f7f1d46ae2d6f4faf8674. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GX3Q92134808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64c16f932f0c091aa4f7323197b63c393f9a6d630dd06321210c960d6f35930. 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/GX3Q92134813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb55f7beedffaa2d61d78d21d4e94d996d537ca6313173416f1fd6d1f8bb189. 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/GX3Q92134933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f9b3532829e4d95b7ac564a8aee912fb75131b4f7eeaddc3251a997b308db1. 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/GX3Q92134934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda24c924130e3c682af2986bc537f1c36f9525ee49920af7547ded2461a0bfa3. 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/GX3Q92134936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60237e36b6a043e2a31824f36f1dd28748753463f4b28fac0c51274b09ec3944. 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/GX3Q92134937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184f5af1dbb32a717e76a64e31d1adb73ca6349ea0a91cfa2f34add3bff128e4. 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/GX3Q92134938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b15fcab6a169276f99907f916b1a9d1e1c050bd83477d0b9a85369b4d3af52. 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/GX3Q92134939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe22099d0959c1099d393a28836644d7052cfd9f283a34f902178448f9e0e5a. 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/GX3Q92134941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c6f25bef1e949897c25604465622246d0cfd1c4d28bae991e7310be7d7d41f. 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/GX3Q92134942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432409cfc9ad5db9a39d6015cfe88f63fdf85b77c05b39c3f44fa101953440b6. 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/GX3Q92134940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1ca500251b56c089f40f2ccdccaa7bcfdfabfe4ff038d0234d852143c5a59b. 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/GX3Q92134944.