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 0xd522b0dac0a069fac448f7c59f9ca0deed458c2a2e568dac8dd6a6c7b878d18b. 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/ae4b69c7-df2a-42e6-93ce-3fbf925a1a98.json and https://artists.proofprofile.net/proofs/artist/ae4b69c7-df2a-42e6-93ce-3fbf925a1a98.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 0xd1562ce428392e9403ccb999d0e79c35a3228d04e43a9c9305922c2872a01348. 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/QZMEQ2417301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb599899a8698224ea06d4f2e89a1a1e6e973610718d382ee16095a66ce64c2ce. 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/QZHN62416123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79314f5b6436c61d847803d8138c616c4eaf6e52378e38ec1d425b510b89ea1. 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/QZTB82306585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43afbaf7103c039ec9be31aea4fd12c906ec0cae0c24306bcfefb6e447b5ef31. 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/QZHN72330887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0821034a492e2750e7e706d2084598dc993fda2deae34d1d1aa0c3a44afa524b. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:01:58Z), 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/QZHN72330888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a8946e78870a89fc9eedec40367246e2658e36a2c7f809d3f521edd0c7776f. 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/QZMEP2269248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8241d5423edae2275b65751e94ad869d5dd4358a3fd947d257988d8cee0a66. 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/QZTAU2130595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d83c1fffff2094e99d4a583bccb9b0b746725673367e60b363bb9bcba0f4fc6. 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/QZES62149781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7b5e6ce77648773225e1d5d340ede9ac699853eac93058fe0312878546b5f5. 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/QZNWX2006443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba7efe32248decb6449b97e63b4500e4e4b452b8ce570b332ca77db675486f0. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZHN92014253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c21ba11dffcffbb54c98f3508cbfd6259e1c58e32bae457d8ee84437d5f5e6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZMEN2002835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e46b7543895f5a1fe8f618bd5b18c65ee381a2f12bb9874f5eb9bb82434f5bc. 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/QZHNB2192347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d83c1fffff2094e99d4a583bccb9b0b746725673367e60b363bb9bcba0f4fc6. 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/QZES62149781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7b5e6ce77648773225e1d5d340ede9ac699853eac93058fe0312878546b5f5. 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/QZNWX2006443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c21ba11dffcffbb54c98f3508cbfd6259e1c58e32bae457d8ee84437d5f5e6. 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/QZMEN2002835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba7efe32248decb6449b97e63b4500e4e4b452b8ce570b332ca77db675486f0. 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/QZHN92014253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacbac27cdae146c8fd8d2214fe8935ab1837edb0d7e69b04eddd7d420809aad. 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/QZDA61960853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ffa9614f67a358aa4be4ad8dd6fd722a54bf72d06a6fc1f8738e1dc6da9acd. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZDA61960854.