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 0xedd995b9e882ed2dd723a618ada7611f7653d96594955a5ac2aea5c1911fb56f. 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/d6993738-abf4-4044-aed2-09c5a0c38599.json and https://artists.proofprofile.net/proofs/artist/d6993738-abf4-4044-aed2-09c5a0c38599.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 0x6595724786a8ad67cef2fe6f197f492c01e0cc063a4e1f5ed99523aeeedb7761. 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/COF011800037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42771b127e03b6d611486a100cb35fb149e3222dce7c2f153ae381605a0eedb0. 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/COF011800057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ad91f8a681ad8b027bb8f2ee38f6769d570d0b202b5ee594a4b3c61f04d8a5. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/COF011800039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9614e0f0aa3a96793fe9eff066eb5cc17b4826bc7cf806d5abd1efb91f79a62. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/COF011800053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844d8a3bc6bcdefc0e30b160cd3d3ca37b9c920bc7388cdb7c0f9bd740cefbbd. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/COF011800041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae03192072bf6e721a2b6a304181838e51bac0f45a08ae6b0da99898bff36b30. Chain 2 (Bitcoin): anchored in block 957868 (2026-07-13T14:56:55Z), 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/COF011900429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93be68e4db1036c774a94ee4e33df317fb46c3efb0de86494d0e59995d3e94a. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:39:19Z), 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/COF012121012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb885904c0f4bcc8dbb4a4631a55387b76d71b08ae9036ee1d5101547b51cab6. 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/COF012222004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa578f681371439b64b1b84ca499ae7c8bf0c4d3dadfffe99552b58640b8b35. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/COF012121004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6559e69d877b14f3dac8a5b6aaaa1a190ff9d50d54467bd103c1eff52687b62b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/COF012222022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1bbc9522e00dc2fac94fe099c063c29249e04f5247f22162ea099a0c424310. 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/COF012100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93be68e4db1036c774a94ee4e33df317fb46c3efb0de86494d0e59995d3e94a. 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/COF012121012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf23aeca6bc38d1d02bb097864b74599409b52496f246f36ca19ad891260c76. 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/COF012222006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aea6191377f381c76f90734c149819ecf629499497dc05a39ae5c1bfdf94dee. 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/COF012100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fa05437b344d50a9bce3a91ac9825448a2f00d32160bdf7386258b791d9685. 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/COF012100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5f36913f1543493eadbfe931fac1284d87557c0b8f0ee3c4f707b3a46b0b1f. 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/COF012121010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa578f681371439b64b1b84ca499ae7c8bf0c4d3dadfffe99552b58640b8b35. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:20:24Z), 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/COF012121004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb885904c0f4bcc8dbb4a4631a55387b76d71b08ae9036ee1d5101547b51cab6. 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/COF012222004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6559e69d877b14f3dac8a5b6aaaa1a190ff9d50d54467bd103c1eff52687b62b. 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/COF012222022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82323f64c58e9e6c98324a65b5941c3dac29b4171c5af6ee201e8fa1ad5d555. 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/COF012121055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af2e3ef44712453bee75143550abf248c8f509ea854bc749d911c4bf710cef1. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/COF012300129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07f4f248cf316c4176eebfbeee33e9d7d4c9613972aad7acd56bc8dcac95bf6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/COF012300216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c18cbdc9e15e759057d0bd183ec966f337d77897668e7fad87df68f8306da53. 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/COF012300468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a50c189af0641f3384918ab32e412c8ae65a77113f41c8fd30b40c7609b3ef9. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/COF012300479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af2e3ef44712453bee75143550abf248c8f509ea854bc749d911c4bf710cef1. 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/COF012300129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c85fa6ee498b6faf695ea685fe7480af4fcfe286d9a5ded4a2ee79027023277. 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/COF012300224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c18cbdc9e15e759057d0bd183ec966f337d77897668e7fad87df68f8306da53. 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/COF012300468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07f4f248cf316c4176eebfbeee33e9d7d4c9613972aad7acd56bc8dcac95bf6. 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/COF012300216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98626665967f913a29eaa1a814a145de2b061f75b3157e8f514312edcd7994b2. 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/COF012400154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a521e340e11341a3704d758d1e7441a1b19926e1a301f24ddfe08acbef1d87c. 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/COF012400140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600d275a1e25dd83431f873a997fd76c41f2e9d5a20c0b64ec5730cb62ad0417. 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/COF012400156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a50c189af0641f3384918ab32e412c8ae65a77113f41c8fd30b40c7609b3ef9. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/COF012300479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99726379465abda2c07c5f2d4075d8a4edf2b18e9d8d9fc61e730319dc6e96ef. 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/COF012121008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98626665967f913a29eaa1a814a145de2b061f75b3157e8f514312edcd7994b2. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-21T17:35:10Z), 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/COF012400154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005078cbc8c9f51f4262bf14a65fea9d66ba14fe95faae90dca150a9af922e50. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UYM122400593.