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 0x2c34da78ee1cdf85143b50ec6340cd29ce60b962531b12ab3248ce8416e9dbd4. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7fca4d09-bbc3-47f3-a66b-99e65a29915c.json and https://artists.proofprofile.net/proofs/artist/7fca4d09-bbc3-47f3-a66b-99e65a29915c.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 0x185d8fc10eccb82618501e9c9f55723a95ea3b497abe1eb336b9ca103e24140e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:06:55Z), 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/QZXLZ2406091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ae44d75bc5330886da286c4240b9e2fe75e19c037f89f5d6262a248f859308. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:37:33Z), 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/QZXLZ2406092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b25d8216ab11b8fcb2fae68c29f4a49a8876a2477468875ac942987cdb4bc09. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZXLZ2406093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528770d328f865e5e481ab051c816b2a78d81dc868cf2c0c322fd916e4410bd0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZXLZ2406094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abdd15bbdd05303ffe3391b32fd36653d6bd864f7d8a250ad0092434ee500aa. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:10:44Z), 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/QZXLZ2406095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb0e7a709f7afd92a16f6869a5c5cda34cd11c784ad4571f6fec9e464740449. 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/QZXLZ2406096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d22e3829bc7019d8b9d42398afb382348602fbdf0a462d051b1760a7ec6821. 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/QZXLZ2406097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74747f2fa49a19aa1f7238306ae35c909b298559af35d12ee103803bc4e27cd. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZXLZ2406098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb6460cc3c887f62c0a789639607eb03db758e52458b239916cff262e2749ca. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZXLZ2406100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4dbc311e7f73e966b020433e02fa6e1c26c8c75b67502fcb00aec27366c49d. 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/QZXLZ2514959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be6e74e881845ca5750ff42b5cd867af1e9a4066b04016668ae0ad1434b8c56. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:59:14Z), 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/QZWFM2593124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35560501f3a31f6015aa94a64c3524bba2a60a2ec6b24e3d9332667691623e18. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZWFM2593125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad39db5e32d9de60f1993341041ee4d2134e3dd1ba57b90207a62be45d92f45f. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:26:40Z), 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/QZWFM2593126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d1c504ba43e104766f5e1e0d3f5856c432beb948557a4c784056eb77baab64. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:10:04Z), 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/QZWFM2593127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffa362dc59297e11cb9bc75885ef6cc821d505ff5b40dc8aae2bb01f191c6bd. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:48:09Z), 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/QZWFM2593128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36d09ce65145a2bb017396364dedf74f0becd21c7468f2d407dd287dd224b57. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZWFM2593129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b665638895e82e40f43f7f0bba2c78f3970c06785e340562e08e57a4a1d58e9. 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/QZWFM2593130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf74f40483ec2f170bc034b940dc298ff13ed9be5fed327c2d694d13535ff38f. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZWFM2593131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b75f289f13f550b965a14a28f572edca0e9c67f5ff15b0fc962d8edf70df7d7. 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/QZWFM2593132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37b7580b15edf44e06a79998d45216e2260f7767d3a469549302445c21d21a2. 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/QZWFM2593133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7af18377a46182e5baaf8037a9f5cfe5d99c7760b3e7f5bfa8dfa77c8a3d29a. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:07:46Z), 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/QZWFM2593134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309589d54597f07f0f00d630f4e3e56c71bad6ec01ecbc1fea8432e92e9cfa54. 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/QT3FC2506531.