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 0xb95d8df31c6ec4c34347a5b1792e9a81830bdfb1956ccabf4f33773c60b24f45. 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/f1204a05-d666-4bed-b719-14a1a38875ce.json and https://artists.proofprofile.net/proofs/artist/f1204a05-d666-4bed-b719-14a1a38875ce.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 0xd197034e149b21c7581fcaa83857b0d5446af5bbb0a8599252a16b3b2731db27. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TWDB52400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3142d84be0951992aeb2b052cd92a8ebbc02ffc882da852b6d3e3c61b048b13a. 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/TWDB52400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6e8fb050da3d100ece2966d5b8309cf10b90d0b250f89a7622cd36ac276950. 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/TWDB52400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a1ad0b322d5c50233b44949459ef222ef7c885d12681fc0be7ef0170b6e183. 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/TWDB52400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a60a0cbaad8fa11700ba093f0094f7d9d25f95d1a1ec67e2099a5168bcf40a. 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/TWDB52400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994ea2df5c68be4b51996b317139f23562dc74102f4cda2464a805caf48fbcfe. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TWDB52400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84dfb9f526cd42ac4f002d25a6a63efa9f0ecde11072b8fcc62d7aef4efdd096. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWDB52400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67bb0483b1ed1aa1bfc8cbbf26903c0c38205d409a7a14e0f0504fb8b57beb35. 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/TWDB52400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef17ff28ba13c0be632749d35cfebd975d0f637adcade4264c9cd008edc0c76. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/TWDB52400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b74024178c61929ebc3776f6e6bbdc4b361b490b643ab92d4f8afabf2fa090. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TWDB52400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77075d6ec760060c06de99ce7222378fdc7518cb740bc8fb8102c17e8fe2ca8. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:02:28Z), 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/TWDB52400035.
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 0x9e5beb041bdd47b17e6a6ef6182d6adec1b854161d3f8a1d0073270a6911cb78. 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/TWDB52400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87a457a53f9c63e28afe4154ca5c8e5c21dd2a445db01d5bc6064ff208d519f. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/TWDB52400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0432ef3ee2fc35dc8ed69a4121a7152dc9f36c12cb03e9414248f18ff3ed66. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/TWDB52400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3dc6fff7ea05f919e889e26106274d38c86006f99494fbd58026e59056d3d76. 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/TWDB52400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6a12929b3d21f038ca2b121fc05735452449ba8b046347ac23ded947a40a04. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/TWDB52400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6604af20f75a96072ce73516f5702b6ec2af47d1ca2832a7895c9f0d52b770f. 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/TWDB52400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d5574de6bb88fad639a19153558c4d8bbfd8af3f09170d7a3a18eca471e7e6. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/TWDB52400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9071c522bb98fe9f865fed23d3439386d45294a0d73299ee917ef3af694eb280. 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/TWDB52400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14cd0f1dc9c54fa6cf2657a1bbe46c2d55a238a7fccea4b94e01a12f66e2440. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/TWDB52400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f0c89841851048f199111283f0073426cc0443478688ed9437fd74a4f9fdbd. 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/TWDB52400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1936bdd9bc88e356f2a35b468975ffa827ad7a970c927b9ab465e086ceec700c. 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/TWDB52500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19501eaa8fa0b3b2be94aa3974b9b67726b9e840162a89bc9204381466da3c6b. 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/TWCT52539479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d45fea17796411145a019d3d52711d5d6de423c6c1deedd568f32e87cba2ac7. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TWCT52539484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a507007a693d85dad3cc1c12f5df024bc675f2708e567c53cdb27da8aabb8aa. 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/TWCT52539485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e7d046699cc85820ceda6b19d95e36035f8fe09633445fa47ddc4b39bb8a2b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TWCT52539486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9b2fb35b06d47052c0a17133b3a45b089d844d406d371b81ea761a5908ff31. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:36:46Z), 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/TWCT52539487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4dacf80c76b9ed7644c24aff422fe4a2a934c1cc8fc8abbb833d3c21c5e4e4f. 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/TWCT52539488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbbf07a8e15fe1e5a5c3f1f5d747ba4a7a736a0345757a6da5d6975835e7926. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/TWCT52539489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8faf5cb79c80a55cda5cdd25b6b175588dfb80bdec41736d7d244872206d3c76. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:06:51Z), 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/TWCT52539494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bfe23c2f739b7f759ae588137f927e23c2cafb63350961a78619e6e271e375. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TWCT52539498.