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 0x25396d23bc88e71a9efa03a0a30cd9208e3dc7721f1b128c3ae481a8bd18a039. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dab9c43f-186d-4863-bcd3-6e2a7c633601.json and https://artists.proofprofile.net/proofs/artist/dab9c43f-186d-4863-bcd3-6e2a7c633601.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 0xd6a1ff612fe9b35dee71734a5ed00de0d48381b4b6bcaf004ce32122f89eb08d. 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/NLUW22301974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d1c8e147d04818f80abb17d7ab856929e7d964324288c2eec3b41b2423fb72. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/NLUW22301975.
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 0x78fdf4bf627bca44626b0f787798b9e79ad6f060f8d233b2db558abaaeb1d066. 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/GBEWA2206490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c406e78d80e49d6c5a6039bf3c6420cc94a9560c46292ee3840fa1f8f8002f. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/GBEWA2206491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881f48d50a02b52918484d08091367f4fad9c9b6dd640cd65668a29c0e90d227. 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/QMBZ92168960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee689dbbf4b9ecb74c2fa020dc8d03d2bac900f0bd5a4dfdbbf918eccfc3194b. 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/GBEWA2203270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f27afee1462026be0fe9caa212d708b2e9f7af5175d02bbd7642cdfe815d6d6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBEWA2203271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5d39afcf54c5494015220b1fc47d02953edfd728e9859f462024d8e4fdac57. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DES232100380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c6d159a185af08c5ad4a8943454a13db88cce0c032480c6805d6f4512a1f90. 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/DES232100381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5db91057dd842bbdb02585087ccf095b07b853a776d2da03225acb7e156373. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NLF712300143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cedcc762c00f3bae3a193afaf115c0288f38e9128134633874e21d7d3cfa6a0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBJAJ2200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba00274fc1d2083e1d7aef290795a39e41d043c3e980a59a87ac74720216c4e. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/GBJAJ2200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405882153e08884b1f0e3773eea4718a3b285d987fd110260ec55bc9fe2de1e7. 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/GBJAJ2100111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c2ff95e16e63580bac44e8a71629ec421e7312b00dff04ddbdc5e8f121de0c. 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/GBJAJ2100110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25de048a9601e74df1b5f5090f2443bc9bc9330fb1717076b1efe5b92182fb1d. 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/QM24S2402018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a90e23a58093e3298c7926ecb8746f9fd3f8c3201a8d6903f5967e52c0b293. 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/GBEWA2306490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb9b3dbf49cf4964cab22b8a0257e5b2455526f130bc70765a166e76f9d650c. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:31:09Z), 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/GBEWA2306492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d77835096fbe13fdf08956fec0a1761d0c6e875895f47298418d4ca6343f5d7. 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/NLRD52339964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a87c42336ec5f0c2998648d9211e5a419c0b7782fecdea8f8391e494ab37849. 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/DEVE12400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c48e21f97ff25513e53e686885a1635dfa59bb16b8a466b2fa4aa9511741323. 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/DEVE12200171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e1ab010aefe505e2fc2c133a59cc5dd2e01a449d4d77b2a64d26ba0b2b3d62. 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/NLCK42224487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd8a0804ae5786be72ad759335c1fa0455f3da79cc6585ce3f503a2c9696b68. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-21T22:48:12Z), 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/NLE712200160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16825d4a7c480b2f15950481020b247d6811c8260f8844910d63cfbef78703ef. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/NLE712200159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ea2ca90247aaa6a56b4d106db9c42a1e9100455310abd2e292d13b2eebd991. 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/GBKQU2199926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffeb95435c662992a0ce4175e5eea8255ce2a62d0867c5106115b50ce0c0d701. 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/NLQ8D2101299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f50b8783dcab34bc6ce769dd0403a16cd620151ecf365fdca010e825ebc00a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBKQU2189991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5316054814afc664d16ae94e751e107d821ee00ad1a8cdfbc6f64a2d5b3b5e. 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/NLF712105678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d57cc9087bc7efd775523f8ce2aea79d3f395a64bbd551eba5bbc355bc16dd. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLUW22101370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2feac3adb38c77200a75fa91a62d16392f5709416993e56e165acd7c1e3438aa. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/NLUW22101371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb544250dd2820da89c1b9f1e89855a9c80bb9204709ed62ba36147724196de76. 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/GBKQU2164417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b76c8ff07660aa840d88e507061f5e66aa5d17275b446bef9eba60812e2b79. 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/NLS242000437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714827ab569db7b5d0ee58539636d6694afb861a396764544ba3dd8ace708543. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKQU2113675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9f1c4f299b9d7bcf015b152a414cb7fb479a088f88b4d7a33826458a32fb4d. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBKQU2113676.