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 0x81646dc6eff6fc797a721174f0f1572daf6488a7dceaf1a51115dd83fd485daf. 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/2591908d-1ace-4ac6-bfae-2d38b9b7dbf0.json and https://artists.proofprofile.net/proofs/artist/2591908d-1ace-4ac6-bfae-2d38b9b7dbf0.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 0x660447c731d9ccf0ff658bc910f563b144cd986c8267eae2697e6cccb7095d10. 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/QZ5AB2142235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6a1da7563f0a97716e9f16db136eb897c40c2515908d98afca617581ac5ebd. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZNJY2003930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98fc55cf4faba98ccfe5c6bf0c878a62ab5378ddf3fac9628c521d688368748. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZ5AB2142280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a64c02e8a11082fe1d1efcf923eb15df03858735c1b061d4f632bf2a65a3c0. 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/QZNJY2042485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6304f2b05d4ca2a06507b8755f8bef4b4949d585fbdd99b63a9a984158d34d39. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:21:15Z), 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/US7VG2116487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403318179b1839de88b04e64fa7c6aae4527e1592ba5dcdd8bbaa9082abaf743. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/US7VG2178352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb053dd1f66fd84cb492daa6d7b1cf6b1307214bf4c6c46dcbbc4a05d1f1b30. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/QZGLM2154695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68cce632293761c19fb17090e528d8db33ac78f0f1b5fd183a2f22f4e1f0aee4. 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/QZGLS2188019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592f27b2750d45ae08f453d2d59ba3e4f615d56c6ddf7305cfb57e8fcd28b720. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHZ42117011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38498474a955d9fc97cacb8a95a99acc1ffc147d588edc8a01fbff56d1eae748. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/QZHZ42117131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0ddb1641f5d89aedee466dac7178559e76ae63fabf6fefa5bfbe546c04327d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZMZ92133023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696e86ab2b58f4742e78c99c4bae0618974b8e3c49688b0d0400ea19e6a7f652. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:20:43Z), 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/QZNJV2159206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2474fa9d486e0e29c6165f9966619e4423609ffdbb295661aed157dc853ade43. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNJV2159235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97e31c29f847359342502cd3945702b413558c69d6781af17db05774b810f10. 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/QZNJV2159325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1102583a272971c357fdfb7ea75fa76f7f361267fe05ec54cb40ae0b8ef50aef. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QZNJW2167363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868c190af14da3a50d00d9d8bd4517f6fea0ad1218dddd623b002ba5a335ec8a. 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/US7VG2212203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c42ec01e4219e7185b426d14dacdd019c2c9aaf2da0b384e38580d89c2f17c. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/US7VG2264828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4cca96163abdbb573c57e10da3d852f7b958ff99d2f0349adae811a156d10b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZGLM2284501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa600ac8676466b7fc2a88e3d473e8b9e1a2174d00c967523b18e7cf77a9de379. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZHZ42212230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11760db73b516d834fbd6ad0e7b022cacff2d1d0589dbab5061c69d4e3b74da7. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZHZ42229173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b82d844b7130e2da340046489f090a73c6e363729ffe3855a68cd96bb042eb. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZNJY2239764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc9decd37c22d7868e2bc1555fa61de8cab6fd57d3d8d720231767f24b74193. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTPX2376929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6b3c26c126aad70c83d7d7bef502c61946919c3855e715c5cc31354bca498c. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:56:27Z), 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/QZW9M2409510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd0e9a9700491eb9e69318a76edff152f488e7c2170f6b8ece8f8d3a5fc54c4. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/QZGLM2504130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680cadce7dc79acc7116b3063cecd502fe421188e965bb1c130072da0899b4ce. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZGLM2546648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91de2eea7ad0fe7800e2a2a9c8bdde0c1a9590e5ded69bab2f4855e634b05926. 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/QZGLM2595282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b9ce9df53fa0076771658a590e0d65198eeea5844411163f33f5fae9a7dd1f. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZGLS2512715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b0a7f7a5075f3b803884e5b926a5cbc534d11e0860e0eaade35033f0a59a72. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZGLS2566985.