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 0x9cd2702f88f3a46f4885cee4b7ba49bddafbb554d58fb3ac3c7ec323dbd4eaaa. 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/623cc835-e9d6-4134-83c1-f82ce87d7082.json and https://artists.proofprofile.net/proofs/artist/623cc835-e9d6-4134-83c1-f82ce87d7082.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 0x039063b6dacbde6ac2e811ea31fcb4950e8f595c9c27ab1b573727dd06200f14. 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/HKG732430457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea0e6180edac23ddfbffb0bfa7f7d0b10b55b71b7b72a43063ca1c39c767599. 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/HKG732412670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b43947d0bf654e2fcd7d96de0f9a3bb41a5a6cd3589c5fe5a825ac7abd80638. 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/CNZ632301556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718edf53688a1bb9d7fdc8b6ad8ca0a77ab9e14fc32ae62043fedf40b60979a0. 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/CNZ632301558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7f7af4c1bda8fb0483f158d243de953aefb7f4eb69a596819eefc70d28627c. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/HKG732410197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9dd6ee9d710a19082b9cec1c46226ff7e327fdfe43d959e93a156d3b70847b. 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/HKG731678380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28aa8c96463553e59ca55f8de7e0c2dd70af119b71f0ed67d6126ef3b5f42c5. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/HKG731673140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00af3f77ac07b682d0d23cae780ea30564b041701c8b7a4edab793fc2223c091. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/HKG731657008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766f89b82ea07d7ef198d0b0f4e7de4603ddff2775a3ebe4aed09cca73008894. 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/HKG731657009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e785db9c09fc0057c3e34093671b76dc8553a482292509d263e033f152e657a. 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/HKA412300441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce4dcce7bfa1da27aafc2d2e08078fe9e6866f6a02242f72075bc6d6a21c75e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/HKA412300442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea79b7e9089571d94567880e3c08d624bae5f57129e1a320815e1b60fb3bf3e0. 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/HKG731625025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc03b3b51ed382a1cea0c55e645be3e47643f32b983a7c127f48ea02a9021fd4. 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/HKG731625026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1af45483d5dceba04c7f6078e217457900992568d0aeab63a774df9763051a7. 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/HKA412300380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3838cf46cc53e1a784473f215451d9a7478317f31aa93f44f1221b3c6c838e31. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/HKA412300381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d944fd096a259d1d0e9896b0a6ec0280912b00accb7a0b289c7817ec12db8cd. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/HKG732388164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd69b7b98a9ae9b77ada932348009495399b8dc22559717a6fafbd805c496d6. 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/HKG732380693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4b586a867630d686933e04e0952fc1cba3cec7a7326bb446ac80fbd3680e48. 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/HKG732380694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a072ccabd9f2671ddf3765e950fd951d44ae98f6b64da919893a8b4600fe886. 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/HKG732368770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3344f678d4d1f1a58a8d428dced55c8dc9b0e7101a1261ebdc88c952c36ab9. 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/HKG732322464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6c0a8beaec3b765de35bf76025d3c8cfd3e46ecdfa344eed95e82a825d2ff4. 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/HKG732319548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5d154d1868d813074af8f9185a78c7b443b5bd728bcdce0677f155e962bb71. 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/CNZ632300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6f9ee726980da4d3f2ef754aa89b5a12e116f31bc26a137ea6c627d03e9b6b. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/CNZ632300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7602a06b90d09407e65fd855085c4e6d83d8699aaff26213befee1d10eff0a1f. 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/HKG732294041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227d338265c68af3a99fc0d27ae58f34a35e30a21b7a59cc5b8959a142c290fa. 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/HKG732283063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59cdb3a1231e80d5f7e3b02b4624eab49017af5e4c4eb9ab37b88edce8f6a64. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/HKG732315001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d895ffdd73359e245ac27aafcf6919923fc838c314b74761a2ba49fcd281b6c. 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/HKG732319696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53825392397036142594d38c058349288a7f7769e98d641aa7f827c3c3aa5325. 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/HKG732319685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea9c30cd8c7dd22e2bf2629addf9a50e66fe4e07e95240909170a420cab1b4f. 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/HKG732313782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07bfd1f594222be02d1cc5548aaf99a575a74619d3b9613026e4e9765ce963e. 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/HKG732315163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567ba4c01048b832feae9bd3d176cf5b10095d8b5f59b13d9e11113a77675abe. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/HKG732499207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c1b82e987cb5fca53006a9d849ce8dec9912f1d46701f2fa276a7e7a31c80b. 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/HKG732453862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae75e10c6351b5627f98004cbcbf463d20614aee94286af8db2028bc298a0f2f. 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/HKG732462895.