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 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 0x482a640d63afcbcc6b6476d904a6f5370f83d0f323a78b576ab3bbf1831c3bdd. 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/0a4732cc-a335-4b38-900f-c889f2814394.json and https://artists.proofprofile.net/proofs/artist/0a4732cc-a335-4b38-900f-c889f2814394.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 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 0x4cb7bf2d8bfd9b40df9a48e4fc94aee4e40214631c8d25038ab49f28c7550a56. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/INM291916373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8cf91e1bed0ae88cc7156a63be8a6497f5b013a043921c8ce2cec7ff103eae. 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/INM291916374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c03c84ed9c4930afabba31fe39b0c0e0edc0f8ffa323c1f0aed6852a6b7c9e. 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/INM291916375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8d2f0a122a66b61e31dee59761035ee816da0c05d911f8759b025ab661a862. 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/INM291916376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38a87532d9505875d2d784f45d5e2f5ad0fe0a4d413589888aca5a524a97175. 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/INM291916377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32600f2e6a44ad4db9f5a65180356ae0df614006207f726f88f14915b61633cf. 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/INM291916378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68cff2d059fd256daa8cde63dc1ce226cdd0f62af1879d65e4b44c86e0f8396. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/INM291916390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4bf0af8a0fe0f216969cb0301602422a6ea4aafcdd314b110d963457386748. 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/INM291916391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae29fe415c998f57cdc4395ff3a88079b25c0233045d2973b24a6771f27f3944. 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/INM291916392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6612783173f73b6654071f7b3b11d31fe401e937421ade39377114eea583ba. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/INM291916393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddfff6fc19047a51945cfdec01bf39544681476457693695857a72ce3fe0882. 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/INM291916394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c304b6f1d89172101c2d8a1f92b027cb112d92f7c3b7e4e38693492560cacf. 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/INM291916395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc577a0fcecf97110834f01dae3b0546b6229049b37086eb8d667a138f28a3a3b. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/INM291916396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf77fed7df35bea6ab5d11fc5444d676c8eadd528d3e6cd8df4cea61b2273f45. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/INM291916397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c814515ad05923a4178fb4a2a56896238d6799d33a15f425b39acb5ab178510. 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/INM291916398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f33a54310836287f6c8c2f15cdf67466beb9dd61e4a645dfc5efed05440b7c4. 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/INM291916379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690d0fd306469dfbbd2b343f49fd0d8810c92fe2da64ea3a93477a5cbf8686fd. 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/INM291916380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecf18ff916223b72b1ce99a2f866c87579bb800c7c92541f50fb19980636159. 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/INM291916381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b2ad8b51b22ea78710a821383b4d33ceae2c08610540f649af4fda1a13f3c8. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/INM291916382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2322b32bce7ed8bee278b3ee16ca74c083a2115795f682ca34d0a2524697f792. 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/INM291916383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b805884b3fb8452db461faa61b489deecde1ef91cebc7dec645aa386d4ba7fc. 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/INM291916384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1947a2d9abe6a23875cbea6d798c314ed7e2f29871db8168f6af06fd266efaae. 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/INM291916385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962bf258dd30efee29d36e71799d1e6e66a7245b8e78a101e764b6a663c81f50. 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/INM291916386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548991c0e3f159ae4ad642eb683c88d6128f0536c93f0f37c55b606566e26589. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/INM291916387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7becf81dd43f737d4cae136a1d2e3549d9c4790e02f0b717f4a93dd96ed1f6a5. 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/INM291916388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf91a1e48fa1ea39110423237d7dd93e6e5815a4b0c7f08035fc5e066bc70d3. 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/INM291916389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3615bfaf707831b0b5d3efd076be855640bcc706409f06fe1c32344827832ee. 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/IND292217023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb387c088eb6762f198d1d524f60d1155d43ec0a8c0f4b00c96d8e498753ee750. 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/IND292211049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301660f7d63d02cb40e1810f5ac50feee5057dedd645e1ff23173a227a0d3653. 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/INA780821873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145b76db33b869823b4c2a1dad17ef8daaac8541b42dd9d27e59f799217d7167. 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/INA780821874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1fa047a99245b2b7030220f6ee1d41c4eef8748dae03b9085576b2ca4228a2. 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/INA780821875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5c3c3d1ff55dd80f29f1286f71848310320e79c0e726e56af88d3346250ea6. 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/INA780821876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc0d8980ce73dbf1876af62576790672bfba52c35a81899e2b018af4bc58048. 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/INA780821878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd66c4a0310d6aded6b490fa8c61c7e7f92d117678290715dd590bdefb2b1d98. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/INA780821881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7730c4da67002f7c7ec07376b426d00d4bd65a5677638531261416acc400f8a. 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/INM291916364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6ea5878ac87ae94a7d9d2cc05d3991d9926b6e9ac9ee7343bc735d294939dc. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/INM291916366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677928657028cefdb0c63f3a8ecf0af939a3dc428187f6ce295dbc71e9f21c32. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/INM291916368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77af67817609bf986f47dfca61fa217cf70a08f54c297b9b12a7fa6c718992f. 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/INM291916369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58bf5048a39b4c36a8b254fe3ac6279cca0a04f7644b049b28559a8033050617. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/INM291916370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be8e156ff7b4a6682021189b0a47f12212a6170919fa02170b68c84dfe9824c. 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/INM291916401.