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 0x9e1ee1cb64ba40cc143e9ffdccab0732ec2fa6bfbb5527170e2b0025e1d8f8af. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a6e332db-db07-4230-8425-48ebe650b9fb.json and https://artists.proofprofile.net/proofs/artist/a6e332db-db07-4230-8425-48ebe650b9fb.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 0x84c08b3beeada7bfb2ed45548812689fb036e3e0bbfb01b5bae6c6338aaa2efc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTVM2157552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffb82a733abc44567865f4168228977496e7fd1c3f5d0a4b3e8675c8f4667e1. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZHZ52258753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc518e67cb14b5c3563931151bbeb8ed35c8a3b2b4dd38140874f5ec61926f67e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHZ52258750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8101d7102229bb469c677d378b2adc7378507743e5bb5767a8c804c7fd51016. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHZ52258751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19d4b1e2873d7207b524a1a3300a219ce412924791263d261133b41163f08fa. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/QZHZ52258752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99fec2d2a5e820ac99e24b438a03df82715dd77423723b3d7ed26d6a93eb043. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNJV2264114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0c77f43ca8e138edaaca77aaff810d07ec31bbeeb0d8b922f054c47f2ea293. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:03:20Z), 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/QZNJV2264115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0154db82a6d08735e627fb832c10a07b689e5cf0a58b9926a760ea406e5c04fc. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNJV2264116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6e8df149ed588535305741c836ed4dd1e5ec5ad094365a2af425529541457f. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZNJV2264117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbb4d1d6d9ce354f8be15dcff97a6cfb8c9c492167c0a50e25dd83067cf93d1. 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/QZTPX2271993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc475065dbac11c04ba113f90f920f9cc8a019119ee7dea9b75995dd14ef76351. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZW9K2268098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f28a4b0a731044bb8f6557c3ac532c3ba7eaf50c594c8a74b424f9756c5c97. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZW9M2235402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d66f3d10c61737508e1d90eb0c0fab551210c6de96fbb28acadd51a2d03aea. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T02:45:45Z), 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/QZNJV2387943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07ac152bf01792a97a0c19344650b622622338329c4528f32c0f9402a3e28cb. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:09:15Z), 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/QZNJV2387945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2354fa66a36f6bdcc2105bc315ae5c6ef6f907480fd8c0374868f7b5ad1b69f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNJV2387946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b18cd64228caa9c761769ca11b6e01eea4a702337f07acdb65c065eaa309c6. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:39:51Z), 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/QZNJV2387947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc197330b7a7822f383df77266804503169dcbf83fe5868d7a182a95cdb4d1b6. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:38:54Z), 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/QMDA62342194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3f2ea542c01ac9ff2dedd8a180caa5000fb7def08ee1e3ddf676c742a28f11. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMFME2309328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aab46d98239238265ff76866604ab6b9bc30dde903233aa7239fa9862c6f4c7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMFME2375062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1583d866e891e51603d92aa9e0488536c00e0c88ebda1cfaf2cc1f22cd6e81. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:59:42Z), 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/QMFME2375064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3f2ea542c01ac9ff2dedd8a180caa5000fb7def08ee1e3ddf676c742a28f11. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QMFME2309328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4cc12028af3ed7004b2206c2b34749ddcd6802f06c12b7c19cd29921f80a14. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T02:39:56Z), 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/QM4TW2436006.