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 0xe9e50e233c1e1b43e1b921f2ce28977b5fbcd1425a1cbee3daadeb91e2dea454. 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/8726e510-8083-4ff6-8ced-46f3ce6480d9.json and https://artists.proofprofile.net/proofs/artist/8726e510-8083-4ff6-8ced-46f3ce6480d9.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 0x4b3759ea7049b9194f3acf10605355ee3b52284a25a55fc7a5c049ce4839de00. 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/MYUS12300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ca1f25c648af0a00fc3c9a456fb4b27efd9ab9fa6c36d17cbfe637da4108fa. 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/MYVM12200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2966f6f0581eb215e37b8d49bccfab348b8aec78091850ddef15d0ce06cb5a. 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/MYUS12100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aad4fd46fa8ee87d543a11ee6e5f44a12c1ceb4ebb9e3dbb86a21b5a427ff02. 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/MYUS11900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d81c87a98d622baa499260a809d86320bc5940a0a7a83c699c18dd08385eea. 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/MYUS11800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d63b988c32ec66a54e5a6b814e775a690a220f8efb72fffa4bebcc3b2b0c07e. 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/MYUS11700057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9dd9217e32bd365c81d0295ed2e25eb9426c9117c6ff464e4df3acc5c6dd2f. 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/MYUS11700056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9481293a1a07b0becac5f4b2742d2b3bb9211f67a8f98cbd2ca3d77c976590. 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/MYUS11700051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22bb9a6847b135960d2cd21c4e25dd1954bd8e343cadb05bd9f235e09c46691d. 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/MYUS11600057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e3325d50da0e8e6e69eb8904106c8dfdfe9301ae632786c5a46fb4bae8e24d. 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/MYUS11400250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef879e73bf9467aa853607f310c306cce27213be8b755d39f2848c7af049e0f. 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/MYUS11400240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277bc280256af51dcecc9b5f8f1d47e11ecab802cde81bda4b816981e2b7ee78. 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/MYMB11400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab101af26c35d41bbbeb8896961e2a8e124b17960815e61b8c1f7c92f358c7d. 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/MYTP11400132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf4f8acbb5242d54dc1a3c93ea1fce59ed0e37f2a812666e96ed5559d89b242. 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/MYVM11400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96519286c1576f41b62622374115f16cd8e503ce4ccdce8f0bcf9398d87feddb. 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/MYTP11500483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e01f93f7cb7942e294d8a959a99bd143ee61dc635447c4f26cfcc864b8d5f8. 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/MYVM11400123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fdc79e95778f19e5c2bfca089615ff4c833b89ca1c4634de7d9506061b9ade8. 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/MYTP11500482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f343185082789958675853ff0e8eab3adf13a0e39db1750867c30f6154e85e. 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/MYTP11401329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa16dd534de0f867a171d1b9d81adfe2a0a1dbb921ee1ec90c82d465110fb9c1. 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/MYUS11400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd805eaea37bfc485e2eea21a12ca2c49b58f925b07463b0c9cf17eca9e4e3e0c. 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/MYUS11800026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac7a2eae9b9bd959ab68ba2f1d35800fc08e108535e9b71ddc981b7476a5961. 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/MYVM11800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100864811719198ad0b577bab04ae2454681ddeb98eb7245c2cb4b2516389a62. 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/MYUS11800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f2828832357b96276bdcf07317187fc2448bd903f5264f1dfabaf419a65990. 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/MYVM12300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d16e8b2282c89bb0e5d581b40d6073599671a41bf912dee623c61be3e284ca4. 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/MYUS11800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ba7cddad3fdbf2664ff92862491742167642bbfb15e489f9f24a60c80ccb89. 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/MYUS11800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13884bc419f0e315d5d946e91c8511752d2ae567dbd370bc08bd640adba728c2. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/MYVM11700023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7be50d7b8b0af5779de32407470529effa197ddf618108e6f6d41272905b526. 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/MYVM12500055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08236f603d5d89d37e71626859b1c7914a5727678a27d6a08d39ad74670a28b. 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/MYUS12500001.