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 0x08328f29653550ada5d16c814f4e53a282bf9fdbba28c4c12ac7df55e5a032ed. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/51013ab1-f537-4077-9c42-d0d04d77af73.json and https://artists.proofprofile.net/proofs/artist/51013ab1-f537-4077-9c42-d0d04d77af73.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 0x123a1ecd08c5bd45f3d9d18e45f98785c67e19fd5942e17b486a4a46dab80a90. 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/TCACT1626437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5475ac3ece02d7009ac6edda0c13b2199389eaa188e5e16935bd3272ed04c87d. 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/TCACT1626440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3994b5dc21265f1ecae6694fef077f50ef0f64f201f8c894a544b87b41c40435. 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/TCACT1626443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3467a6b6162b72357dbda30e9cef94c1db19d0da0cbafbcbe946d333403cff. 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/TCACT1626448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5f6cabff47d1df19093bf7b6cd7cec4ce5b8b257c4feca27eea4ab98571876. 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/TCACT1626452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b39fb9f9c7888ec622e483bbb8929b7e734aed43e6e04af0a9c40ee7ab4af9f. 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/TCACT1626457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4bfe607f2d841185ef650ee6301e165215575093c0a9266a1817c3e806f059. 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/TCACT1626458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f4ab2c5be88c9bb8e28a758e71550e608158544682f65c8eedf0faa8472222. 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/TCACT1626460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de2da69d2e26af6d19e3ab4b71b17efc26d893c0c63ffa9aeca3e9e984d4f6d. 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/TCACT1626461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd31979a22b999b3d438727c092d4654bdf564ea51648333bb2dd19baebf94f2. 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/TCACT1626464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519d020667d0c62dcd572788ac0ece7ccd45efef4479de6043c3269cbdc329fa. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/TCACT1626436.
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 0xbe385c1e141cf40f354436269b894a77512a2359c11fe6df3e790b603fc0e50b. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/TCACT1626441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23215ad2f5b38289f5db0165d526caef79939cf0612e9318a6ffb9cac4facca4. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/TCACT1626444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad09caa519d6207221fb47ef932ba3be0d37f7473b3ab11b6d1e5af08ee6df7. 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/TCACT1626446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3e39c9da27a64e8982d34a623e5b2a5d04dedb3229ab0b93cbb99b28022d6f. 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/TCACT1626450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51973fcd48159ee41422a3bc513e2bcd9a5b451df60d2026f07551a9639469b0. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TCACT1626453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ef23a2ae388ce9d7693426a9f553ad37417f00947fae5dc2ce1b93fe4bddbc. 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/TCACT1626454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a12f4b868bcf1d6243f7a93533eef6ee199b8fd4d9b075ab12b8d08b964ebe. 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/TCACT1626462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896c67563356382a626404f167af0bb93fce253c13157cbf57410f5ede667082. 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/TCACT1626466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07bfb78f0c39e558cbc598d52c8eda7bb87fa446550cc32cecf94cc81bed93a. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/TCACT1626471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f460eb6f8ea78fe7880851f54ccf386c3aaf48a4a25d59f9918ff7d005c08c. 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/TCACC1427068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4588543efbac9c21005ad2721473291a5f203f49ac53733e039fa01090bc9f7f. 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/TCACC1427073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e320c137c38f7f94e17e333918edf27caf64f61afba2c815cb52a599c39ecb. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/TCACC1427069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a57c853ac4fc9afe1f2a15257b6ae3696ae857fe485bd5d613c7b53a5aa34e7. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TCACC1427071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1177608b23fb34d2e7dedccc98eb0bbfbafd055899bc07b45496a612d015d61. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/TCACC1427072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2d1c933e12da55bea58348e11d9757bb4cf1e2f2265bf476db65df8bf9eea2. 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/TCACC1427076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0048d52b505fcdfd6f0eb90fa65ada65886fd66b5e32d65eda4fdfcf67d8d5e. 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/TCACC1427077.