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 0xfe8512e81dd3a6acb28ccbd90c2aadd075d7785498078c3054936f84edfd8158. 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/8d3f289b-4056-48d2-ab6d-8f9b65c3725e.json and https://artists.proofprofile.net/proofs/artist/8d3f289b-4056-48d2-ab6d-8f9b65c3725e.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 0x61adcf0475d01acdb2354ab74c179e98382c77bb7612da489b8f2cab80265c62. 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/DGA062447022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293303dcac5a212424666b0fed1956b131e544407d55767d51b1f89d808e1dd5. 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/DGA062447023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1459d8e6f074d0ddfb79e95047880a589adeb12781dc8f08253089093328d4a. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/DGA062447028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51ad0232a68d99b7990397b91657fd0c646837615c48cc9e51b4feb72ee108e. 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/DGA062447030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e278abcbec5053f46b64de9ce2f207b8b2808ca7558ee1e84ab1cc7447c970. 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/DGA062447031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e935726d23daa4f9a1920142087e77262902cd603a088ca5a0130c4a1f0206. 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/DGA062447035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6f30e00f8eeb9864177481f2f900bc45cb3a2346f4615a7875b88317773eee. 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/DGA062447037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d223fa8faa8e0c560ab058a52df80c70c5f99e68b4de51dcc1556f202794e57. 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/DGA062447038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb065a8cf3b7449dcdac4db66be2a366154789b446113070c829b204d8b193726. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DGA062447040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a8bdf1d6c3910dc7835d7c6965e1e5b2d0168f43531c6d53df84e7ad7933d8. 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/DGA062447041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d5e26ce0364c2a05f0ef553c874c772949288f5eed1f445b0a87908b013108. 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/DGA062447042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf591461a9695516971a9ad8df4a0e3e8a353cab94b727d30d112d49e0794714. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DGA062447024.
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 0x2e446d121592a6cbdc2d3a29668ac0fb41cc15121a18b706e68ad553cf6aa584. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DGA062447025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a107d48b705096b7d302ecd045f98b1f9d38836066dc587ecba5860ef073a93. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DGA062447026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bbd9061571cd6b9062c3e7f44e276f07ba588f9026edacc42a325a4549f7c4. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/DGA062447027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0066d5261519b233fcdbde0c1008405cfd6589f668abcafccb0e63d4f7fb9ca. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DGA062447029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cee9367391cef3d25e89ecacd68a54a50757ff9a5bb05f616137ba8436b3bb8. 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/DGA062447032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0563a42f77d83e5d072e261630c96c51cd7b75f2e8a9d0023158d60fc486299d. 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/DGA062447033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fecd2c46258c4f48c03c786b2cdb7e930061ae8cfa6edfd0f6e76dfb19fa377. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/CHF032406517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ca5621147d6fbd7414d30ec3d804e9de29267490e608e6ef9f2831c3121ce2. 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/DGA062447034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa979bc7bb252c703c951115f5d4c0a5cd4cf001e059e5261d5975c80a5bdc918. 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/DGA062447036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ac942835a3a1a13d93376fe3bd21c31aa57da2bb24b3a23107dec0bb16e530. 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/DGA062447039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1af6315ad54ddce124babc1d05dbea692d6a29635f8289c1763e000d51b75d. 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/CHF032403845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287645b8032d2ce393ca6cd6004939c5d7297d679b7e727a7ff074612a158030. 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/CHF032403843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f7ac264c1cf34a31a3914853f4684fdb5dac45274b7864626348e0961d2d6b. 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/CHF032403847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0200ca6c9c737f165bcaba672d9fc78bfbf8ca21c66ad0c32b0b9dcfe7b28484. 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/CHF032402798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cdd1c615407921d08383daa3e0af0ddcf4c1bb74289eb6358084f6b7e85416. 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/QZNWT2180271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040f7b0e882c2e7cac20c4f837582d43bc20606fb03caa8ca18531562862becd. 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/QZHNB2185227.