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 0xafc779d6c171e9c7e3bb6990bc127f38a90b094fbb7cf24f26ccfbef085f06ec. 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/a6760a90-ddf8-4514-b139-8b7035c542d9.json and https://artists.proofprofile.net/proofs/artist/a6760a90-ddf8-4514-b139-8b7035c542d9.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 0x47ddf9baede7c8549f2b7ef26dbbc19a0686baf4342a754a29c9f53e9f5de530. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QMBZ91634154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3620d96bc7a5c6a2181399ea7bdc3659bc400556dfa106b532f1ac7813fb1a8. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/QMBZ91634157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff66268ec9a2dcd15b60342fcabdcc596168411d9015ce6aafec1f4e27530eb. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QMBZ91634162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f06b3118c8ffd29005d7f4a3bdc7c785e9695c46fa292fffef7be4610059ac. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QMBZ91634155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ac0499b8df72079364f7358f00e78652c9a68083dd0b73bdd1108e400e6c5b. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QMBZ91634161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ddf9baede7c8549f2b7ef26dbbc19a0686baf4342a754a29c9f53e9f5de530. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QMBZ91634154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f06b3118c8ffd29005d7f4a3bdc7c785e9695c46fa292fffef7be4610059ac. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QMBZ91634155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3620d96bc7a5c6a2181399ea7bdc3659bc400556dfa106b532f1ac7813fb1a8. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QMBZ91634157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05956d50c7549bafbd1d3cb090dd1d75d65645a46bac1f3694872927f05a8863. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMBZ91634159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959e07d5963ced9c8e1cd1ba403470075f52f27c9c71447c4997317131b9978d. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QMBZ91634163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0459c2d2f104083fb1db80764a231adaea8f36ddafce6576a266c65bd42059. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/TCAEG1987442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e3b26f14d60e269e09bbf5e666d17409d4d866dff1a945a6607dc7ecd76b29. 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/TCAEG1987444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5419218b45cc069de15bf1b6bc32a50da060f7e5b6642a38dd0d4e138c6040de. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAEG1987450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3048ce6083169593728267485c03037db7ec044dc050d0776f40ef6f4943d3. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/TCAEG1987452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc487b6aa3e3473302f685773252d2ae62cfb754c5b10e9ba7aa7c2c9dee4407a. 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/TCAEG1987454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8412e586e6c4ff21b2f05ee2570e7555363f00b7dba3ba4ff7236a52f549d0. 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/TCAEG1987455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7beb21c90e77481c9b5977fe053a40dc2a19c24914e50dc3564118622d6f14. 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/TCAFW2168058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd110b8dfa501ae09113a6272a1cf879e52cdcc0fe741466abbe9f61aaf47cfd5. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/TCAFY2183744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd165fdf17309ee50cba479b6e59fd2814464265f7cfb30c1669b45357a1110bf. 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/TCAFY2183745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb48b21a56d54bcee9375770b89781abf661d5b3e0d145699d5f7dce07f626a. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAFY2183748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a37f13ddc66d85430d196f6ca9bd5f0f94c97d632c269f4747d69d8e0e4ccc. 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/TCAFY2183749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467d527be5ec678f0a537b00c6139bc2ab29850b372e3335ef18b452565930ae. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/TCAFY2183753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3e05d3a740bf03659783535274fa17fab6b4ec2ef8f53f6f863cf86eab1f45. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/TCAHT2308048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35a83375b07f7abd3c6702b2291890b3b51c2461ccf9e374a655b2d33c812c4. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCAJA2454370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9c910e83fa36df277a94b44700265fb8f4071ab1fdac791cb980559b1c834a. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/INU392306244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ee1d7bb6c83d71975c5f69cfc1bbdeafac3805d11e0baea88ce83e38452590. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/TCAJE2595186.