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 0x9fb94f0da6b98015991433b194493c6155e2aa1982a647a228834046882cc825. 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/e16b7ad7-3d99-4483-a829-d890bb436cb6.json and https://artists.proofprofile.net/proofs/artist/e16b7ad7-3d99-4483-a829-d890bb436cb6.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 0x161cdaffc35f696bbd218168342c0c5a71f0507d3c328c4f6fda525a8b9e269b. 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/TCAEG1925358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa13f86b8983728bc4645955377a6c7728e68a5da981d4d352233366fc1d3d9. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCAEG1925372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4907768fcfd54a41f7f93a77c4923ed3fb851fe1a825caf7fccec96908be7e17. 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/TCAEG1925378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef6bf99eef9d79a59a1eff7493b3dab351c99e0d5eb8966b192619d5e3881d9. 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/TCACX1773499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fcb2c1c5a8f155b16c29c6f673e3dad7ff7cb79b3f95bb408bda246a8915c5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCACX1773519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196c023d833126812cd043b08928b028b6f3d3f7aad41aa766a9b68f8c59e4e5. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:59:28Z), 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/TCACX1773525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9329daa3aeb83c7c0275bc6b084b616f27ac34ea02ff23b88266fbbc2c36af6e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCACX1773537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f43297183309491ad6bd4b74a808cd17c3bb6c3269dd93fdfdeb28a37f2b5e. 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/TCACX1773549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1571349a7978d7f8307f81a594640543411344231cfe2fccae117a0619b46d01. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/TCADZ1823698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b75b18e5f0913aa246c6fa0cc0c4f287cad554d284f1cdc89e4b153b02b6cfd. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/TCAEA1850637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22723dd221d39a2e18648f299f0408d3567c4f09364001f1f0add099bf85c31c. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:40:12Z), 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/TCAEA1850640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6a47bb0aa0802112f43dc4e0e54dd4c283a64affd68b247e5804c0db2dcee3. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T03:22:54Z), 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/TCAEA1850644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ceac143a409ed95e05202c69af791669ae2858a663f0a2e3f8d43720361ba2. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNMV2162172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe09e6863cb8d0dbe77498c8a1ee8cab22b87e8905116c4088aca8bbd312262. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNMV2162176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4189e14de2908b29157946902a5ce432889883ee65168eb6a29e5047b494ce92. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCAES2091457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cd24a280db3d27fa4a80bb7d658af44535c8ede6258553a266c07f98b9ecf2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAEO1999855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd904c042d837e21e19e08fab29e106db0ccff2f4077d4b9990241468b5d4290. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAFI2138990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5936d55ca2e182e05be9ca5ee8d9fe7f08b6b81fa43e3fd268a34f5d0670d2ef. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:51:59Z), 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/QZTL92194536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea06a17299c466ecd8db3cb7df031c1942c122f79db23850eb8f45c4397624d. 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/QZTL92110781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01b8a3f07bae784a3b1cc092b62c3241d18c9f52679d785f3f702033b8e0363. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCAGM2271676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa645510bef77cd26fbeb51dc15dd92c5824e7555537d044c221ac50c84dac97. 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/TCAJD2594425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1747548baa661e478e145f41d3537cb33ad2f91b1e7518d897d1fbd2e3a2f7d4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAJK2599218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7062866fd9f69d6be7476338e8f1e79dfa61634276f7179d9d7975e7ee414936. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/TCAJS2527846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe0c38c9e4fa7f48b3eda06c213ebca8cc4a5fcdd7a0eb6db3ffb031c4ab44b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJZ2515556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf27d5b516a7b7b35e6f33b8b695e59f7daf55cf8053077958aca9e4f452afd. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:25:58Z), 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/QT6632519596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42253fc4c8b2010368e6c0ff8f04b89916867e39ee1747e37c8bbdea24b9a647. 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/QZTAT2197434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456c441031bd695ab64c271ece22cabcb450d51fbe3db46a86fa2f9be8351509. 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/QZK6J2470508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f662e522ad49392c68620ef4f02e7693470ae7579b28e55a61a65e7385a9f6. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/US92U1907587.
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