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 0x7ea46e349dd362167109e47cd94d3f9149c9ef027807deb12da79b82ecdabdcd. 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/27da4c81-d5e2-45c8-9d5d-716a4e57e58e.json and https://artists.proofprofile.net/proofs/artist/27da4c81-d5e2-45c8-9d5d-716a4e57e58e.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 0x2cea47be3e0199a6cf3ea4328edb51904a42dfc79c7dc8f45fc9e2673e1042d8. 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/QMEZE1778598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fe742a569bf43b37813ddd8bc94d6a569e63331bf17478fc83c5b0060d3a60. 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/QMEZE1781097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882e0bf7abc19174ad9d0909e04c4c4004a822d6958a535af524f330039fe73d. 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/UKXN22109268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d850a20548f9b77145981393f83b1d1af1537981e0c81e8465fdb96a5b217cb. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:37:45Z), 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/QMEZE2154806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4aa9016e17c9251653fd8816b25a8a8965de9521a8c42be5c1ab3ddea836a6. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/GX3Q92188189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7055cfac6ae670bfb9d55b9e0c5f13e83ebd4ec45d9d67487006d7e83603a22b. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/GX3Q92188190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cb3eb1076b37842e0a3b6583b4668ef940b7115151481407071fd1085a1b66. 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/GX3Q92188191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289d0b98f4d5a6ca2e1e2dda2d18fe143bc5d43bdb9ea027395b35280f3e4fd0. 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/GX3Q92188192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6082b84c8e8d44881b5802fdc868a01c8ae9304dca1e44edcae02251c1d8e7. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/GX3Q92188193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ebdf2e8876e17e030c43ebbbd6e50a6050bb0f97a3d488981e33a491ef6ec0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GX3Q92188194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57cfced96dd5d598dd0399494ea2ddb208f04b39b4bed8f969a5bb25211d4191. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/GBMA22300907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899b1e89cc4a99e1607ae7117eb1ca16f8fa4691460aa04f665449bd65cc4861. 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/GBMA22300908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cff577bc73f84d82f7f4ab4396cb6e7631a8f0c9b2f542c673af4f386fb187a. 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/GBMA22300910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3caf07c259c4eb9c31ebd3a5784cb53f56d5fb131bbfee29b40669a1e7638f3a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:02:13Z), 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/GBMA22300915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ef35398474126d3c4f35efce28e83c754319daaf89e619242f94f74252a231. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:57:46Z), 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/GBMA22300917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb41f2600ae60e36a8f4bb373af4831e2534e4cc9d308372389849fa464ef086. 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/QZMZ92521658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284e95c47a79189df2b4e360ad7fdce9434a4a3439918d7c4fbdb42a17db29c8. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZMZ92575998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4f785142ee1bf273d9264c6662dbb8251be94e7d24c4591a96153194227036. 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/QZTPX2507849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee184e2a15cf57130cd48e546c597cd42bb6286ca3257787323d5f9b7dd3f02. 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/GBUM72207432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd48abc2a9139f422552a8f9d2554f818ac7de8ff38726b70653258ff784c5d5. 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/USL4Q2273495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ae8fefc36ad78c6f9ede6171409e92394f2dd696ce2e38c9aac1e2b2684c2c. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/AUMEV2368383.
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 0x5f676fec80c03fa59b90b836ee2363efa802b9cd5ec13f3c46f88e7737c76a9a. 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/QZ85M1937481.