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 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 0xf8d989b47cb7fc939139d961f1686a4c2ff84364c8d588045b84d2a8e7e1666b. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2900ddcb-469a-413f-bf63-a03e0c13cd93.json and https://artists.proofprofile.net/proofs/artist/2900ddcb-469a-413f-bf63-a03e0c13cd93.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 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 0xdd9646dfab2989a394a264646586126159f6dde2148ec06b64f997b818b6da92. 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/QZW9L2275699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650c269b48beda58ecadf556ce919ebab6a84d9db614402f2f87be8abb8402df. 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/QZ5AB2358097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f0b9027b563046f003648837920c73377b4d098b7f4519c9dc4a996cb984e5. 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/QZTPX2147729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41faca3a75a09e9642997f489ce0876dbf58df30f414bd98ab3acdca62edbbc0. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/QZGLS2250192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114d4800e227f489652f3abfe6906b99d32ccff40ad157634646386828be5eb5. 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/USHM22291828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4552178e706c6fb455c04177ef40fe9942ccc8e67f3bab0ab527e706f6c713. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZHZ62102957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6184b29c6f2969d88ac0c6837acd2b710d06aaa963e6291be3e5109e116b321. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZNJX2264848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5dd492bd19bbf2562477c476bdb0c4a77ed89f9a8eba2176a58e642bc1a3e1. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USL4Q2083792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4a79ca5a423365b377951045798dc25b87c44e9388cd2c5a247c6f1da36b81. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USHM22291829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f83efa37f38bb850d16bf4384120d7fe8fe44dde68a4dee99761cbd0ae7869. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZGLS2420381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354c55dc800dba455410f28452d962093f8afa4fa34184e2908d45f11c503661. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZNJV2166725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4552178e706c6fb455c04177ef40fe9942ccc8e67f3bab0ab527e706f6c713. 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/QZHZ62102957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4417827c47bc2ce1be936d6318fafde38eb702044fd59c5efde4390480b9a49d. 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/USHM81901863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc60bbecbf1ac57e69fb74e5a581d0232aff83522941e074b3cb2bfaec2f5a1. 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/USHM91786387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24af61ef8f8b21e54ed0892c72b9ec3eac4cbae6f42b5aeda670456205b91a5a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM91786390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78dfdca6d5cb8f3da2807cdd1e52545863bf334871cff93a2e0bbdc3aebc663. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZGLS2367956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43875a234d9286acd5201aff17b2c64af1bee489ef0bb5abf26ce8f171ab7773. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZGLS2373496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25d7eb1e4e2dcfc048c10d351768e40cf75ccbff35e16af9a807fc98c78630c. 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/QZGLS2373261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc0c575aea81489f55d7cb5b8a1b43ec21a7b3282002f93594db167c03746d4. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZW9M2260310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa832e37056ded138c3cd9dc50a8d4ecfeba0b7ca26f0bd4cdcb60e2218c63ec4. 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/QZGLS2373495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4df3f8419a55fdb5caf6fad5d389c8c0e83811fd10ba567641865bad42422c1. 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/QZW9M2226672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc143936ed74f4e1d0472bc156912787226497f9634f47af47c3abe46750e89. 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/QZGLS2373450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa144f4dd5aaf7bc0484e91f4587a60cc8b67410722491138c6915b190533e1ec. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZGLS2373266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c990f6cd13610040adffd46915de90cba1230df2a0b130db2f974a62811e924. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZGLS2365521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc2e47ce128e35cded168b7d6ebe7b1c6127ee07fe884396d1599dd844d7720. 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/QZGLS2363502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfe987449b1091e25081c71f5c6a83ab902e15ef2ff5524539867db75c22725. 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/QZW9K2414777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06de3484c8086f10d4770e5fc2c74e4b3644669e0febbfed9171cabb70f3ccf6. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZW9L2447653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71df4f11f1ef4daf5c01289166e2077a12460933269a2c9225e3dd8d62cec5c. 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/QZTPX2493175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc182892925a9e9f92c2e0c99e1f644e9d4a3eff024c191bd6eea0a296cde03. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZW9L2447654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ae131ecf93237daee7a9a2290f07df10d8dcba03ad128bdea532691261b56f. 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/QZW9L2447655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeaa9ff57c730b0f020176209ea5a2d69f2262d0f43b949cbfcab0323121cb23. 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/QZW9L2447656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6545f140e51ac1756b99d66c3830e24785b85960e0d0b0f93a3faa4f3b401eb4. 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/QZNJW2446865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f83efa37f38bb850d16bf4384120d7fe8fe44dde68a4dee99761cbd0ae7869. 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/QZGLS2420381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd19a7eea3ab2d6589a3691510cf396beb631af057948059be4e8547fce852f3. 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/QZ5AB2398894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd079e3ad5b904c3a2c0e7503a628f6995da9b4df4d4e8fc61c86bef60bf4c58. 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/QZNJW2340178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167c0d39ad1a41e389de819c6540d83030b9924015b2b7a0863dc37f8d99a4b7. 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/QZTPX2306792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23a401720aea487f1e21cdf4aa48e8b6b6dbbe8dd41a89fdfeabef5a9f9ffb7. 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/QZMZ92331480.
Esclavo en el Cielo, Rey en el Purgatorio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d02ba31d1e83efc36dd89b14b45d628ea8f77b807e357dd6709d410f4bd900f. 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/QZTPX2306793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bc4fdeb3417d2daa135c287533ca2d9a74d77d26144992d2d022d295f409c9. 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/QZTPX2306794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb7cd3c84a37d819f366959f619e6c62f3edf64df8f48dbce3b4c7b03307b31. 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/QZTPX2306795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1812930ecf94c3dcf0141a3f7f110c008f3f27712218bafb77bab1d53e3e45e. 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/QZTPX2306796.