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 0xa65179a90b833b6f8dfaca10ea29e07cdd9e690532a9f1fb4940cbc82ba1aeeb. 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/c6177fd4-3b45-49b9-a0dc-f3f8860e3c7f.json and https://artists.proofprofile.net/proofs/artist/c6177fd4-3b45-49b9-a0dc-f3f8860e3c7f.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 0x0061fe077cb99430d73ac1086a013b49f6b6ad8bbcb9a88fdde5eea8ed8f6b32. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTLA2486313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8527facb4d380701d60f31ae208e726394f59773a429a666a06036e097d0653a. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/QZTLA2403493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541977a9e9e0893ad7a0169356396f5d7c15b026be5b735959ea1759e78db04b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZQAY2465222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33a9567146de787d1f9a846e69351c22055eedd96b84bce50550db740b632aa. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZS7J2462116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e217926d8e59191c53d08f1528c53d8e7efbcc0860b8dbb7ba61a85b9bce404. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZS7J2444924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19be6b4c30321a8ac334cd68b403ed6f66fbbd318d64211680f24f2173b0287f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZS7J2434997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d740163e393f0eca011dac094f1e42013f36fd77186eaf30c03a22ac5b8b6cf. 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/QZS7J2481450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2bc4384f3f53227b928feeae1eca8e36187f6eb6ec6fcbb64d4729263db7c24. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZS7J2484795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb54009d2ffbe1804dd7d0b6d98f1d08374c369f55bf794c207f543669ba9f01. 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/QZQAY2499662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b5a18e22535b2767936ecf4b1949be037015f249b6d56285c04b4f97e3fc6b. 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/QZQAY2442389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72bcceceb96e8989231b7671c025d85950508770cd68177390fa714d087d21e1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZQAY2451007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a357712044f3c2abbe1a869f13858af6a7b944084f5b0d1f910a2b0e5327ebf. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:43:28Z), 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/QZQAY2401589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985264b8a14562b2687c9f57a420ecae860864f62cc76d65331a2bec639babf8. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZQAY2454895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45574f9148d7fafeeb2a07282c3c5b3eb118536d61a5eb42a9144190995c0c66. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZQAY2489998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84adff22aa58071bc8d12ef2d4c8431ad2bcdd5ab5c80e5b334f5e4c86ecbe00. 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/QZQAY2486354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9991164ab01bfe092a37d877180501e42501622b0cded1cd273885893e001f80. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/QZQAY2420044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddcecaa565a7f8f57cf49492ca504ea58358cf7f15940705c95fe73d1cae37e. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:10:58Z), 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/QZQAY2405618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9088db9ec3953c6f872e01a7dfa536f04507761989ff6b315823f8e4fc417927. 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/QZQAY2404378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ef30dc629239b8c46e4d0f681d3b7c73ee7c338c352bd50e10cfca73510639. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZQAY2474533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af884780859c0b3d320c4cf48bf6107e094862cf61603f69e9d081c02cf7e53. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZQAY2498982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae65770b65d59b95be37c6ffe6c735c5998417cb5cc9ff2f3334c548a6f2b23a. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZQAY2459893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd23b0137d72eb48925efafbec3673ec538caa5a3205fa639440b4fa1b81398. 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/QZQAY2471041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf24bd98083dbe22cd6f4be222ad65e4c3d5d7e5d723b7c0d1d6cdfeca38a94. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZQAY2497993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef845cc15fa1daaaf29c0da44d4fe2fa9df0f45a6e99f12b732b8e8754a6c192. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:05:27Z), 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/QZQAY2465614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca93f5f06a53eb668c2a5f2199a97ca9c958576ac4fbd716905a675a223d9446. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZQAY2478774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd0599064b21a4110b6294dae341a56e83f0180180e879f2a55ae7bdd146833. 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/QZQAY2424583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe138027c1820cc2e71c844a00df9bb1347e6bae5c22346940906e3bbe534c66f. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZQAY2470471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9a67d710a68fdd1daaa534eb6e052416aba79fca5a5e974f9bef52c8931819. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZQAY2404318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f66e420911dff89d468ef84732e6b7accfad0f28f1978c4ab4dfa8c1167b59. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZQAY2418734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240a737ca2d0726139d2049ea1cc6e6ba2e4b3c0590f0d129794fc64a0084f53. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZQAY2440540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2979b39f7d93fff6f75701c6297fdeac56a7d613bf3505a83023e073c4143ac8. 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/QZQAY2431232.