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 0x8fd70804da7abcbc56278309412cc90a3569ff5d24160d55359cb05cb6935c40. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5e785d9-ced0-47ac-a40d-0c26728b0f05.json and https://artists.proofprofile.net/proofs/artist/a5e785d9-ced0-47ac-a40d-0c26728b0f05.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 0x046e3eaba7355f5fefe6ae92b62bfbfc6df6662149d0b11176eb1c2ab36a743e. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/USRO29331505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b34cc29460352527747d719324f4faa2eeacb50dcdd1a35d5acafb81eda6cf5. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/USHM90885127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463f50b65a7ae47ff36331c5358194a3f97093d8410dcca99b85b19e52854c3b. 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/USHM90885133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68de225c5edb43d47032848c3d9ed892a1bb674e9c0012399768ac1818fbdf42. 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/USCGH1379367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6a88dfe355ae80940ae63fac8d4d5e1612b1e228767f765b2ee7ae94808064. 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/USCGH1379376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008d15565a1f203203fae426d84d0b55cb4e7fdb24cd6e018f5ca3646bfc0858. 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/USCGH1379380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9631a7f2652f2262e15f767fe98bed7283df0b7ff6c08d5da092fb5c1010305. 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/CA9521600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c623593ba480f9bd30ca511b6947ecd065a529f50c662cdcddb383167dccea. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:10:39Z), 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/CA9521600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501f41ae973152c0d6aec6e45ba9ab4882c401edb86e1dcb6a3e610267097620. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:33:40Z), 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/CA9521600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c604f10a04f8923bfea94ee03401a348e7ff3dcfdfac4b37842ab1356bacce. 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/CA9521600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef0d06dccfdcd9fb51964a5357e745de9231da469174da7ee4bce2e7dc4f706. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:54:02Z), 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/CA9521600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc921142d60d8ddda1fa49fef97b1e327e011c57bd6355230eb7dc9d7975b4cd9. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/CA9521600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0403a89443f0b4bd2dc266a8ae6a910a8c95050bb28ec482d0b3f4601b71427. 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/CA9521600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22c25386eec65a4f046c82c0f3407f837c1a7e2bf2ed8762062116b58dbb1b4. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:08:51Z), 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/CARKS2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe591b1d2d7cbbf4588faa57e067a1275e4068c46cb7e8f2a697161b82eab5f81. 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/CARKS2100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6c310e380797f53dcd0f2259f90e1bf7c48973f999e889f174cd9de3de4f82. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/CARKS2100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9d3f6137f2b6dd3618f63c62bf3e8447dcc6f161e08260d7f59ce7c76bb91c. 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/CARKS2100103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4130e12148de21ac988ba959c1f16cc7ed8a9f3902c80cdf47d51c4c94d282cb. 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/CARKS2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d93172fa48520746a1251a993795e912ae0b428c7c685ec06d22ac14dbde29. 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/CARKS2100105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae33b8af39bce77cb5ca7705293c38db96eb5936fd6ad8294520796630d9e84. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T22:45:34Z), 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/CARKS2100107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe90927a6addea6604ec37c189f9557cdbcfffbe896fb368cb66ad1fcf90209. 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/CARKS2100108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e34dc15564eafb304eab8a885dd058ee173aafca616523071741b5a25092870. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/CARKS2100114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb6a4d53724a3b07a29e47b669be8fc94bb3da983dd1c2d86ec2b06a2d25469. 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/USAD40500039.
Old French / The Wise Maid / Swinging on a Gate
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc920f75ea70d9adc222d299f5354e231f9167f6bfc3e1713910d93ecd7e0526b. 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/QMFMG1467035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c6f4a6071b1cf664d5e19d0dfee2a634cdf36f27b3b9af51c08a9fa272539d. 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/QMFMG1467036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54983523ec142a9db6abe7d757d26b9642434330b16e5a03b7ae20076fb8f6c. 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/QMFMG1467037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c3d37ae3369c3eafdc5df424a85da3a452dd9c5a3d538ce8a3731edbc4e85e. 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/QMFMG1467040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc312ddb718c333206e988f1f4ddd721ec9e8deed3e4ffdc0ca50a3433a40db72. 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/QMFMG1467043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2585a5288f2b91ad6c4a775e653b376bea7cb0d357e41ca1ad6da6bda491f4b2. 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/QMFMG1467038.
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 0xadff72f88549f87e3254fbf58dd2e841f0cbf42f02fea34780c9490231ebd7cf. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QMFMG1467039.
Arkansas Traveller / Little Rabbit / Miss Macleod's Reel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fff7e26b8dce471a2359439ad0d724efa599304db502cc9835b60b7f6255f1. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QMFMG1467041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a6790d09c8f9feb8ebb757fe2fe2c1f5ac8599d95e42bf5f885dce03597777. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QMFMG1467042.
President Garfield's / President Grant's/Rising Fawn Reel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d3f9389ce25089fba9a15192effa5a64db7e3f9ff2d51fee7945c5207d6cfc. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QMFMG1467044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469b189aee0e9bb5943ff18bfaf698df454f42c3be5053adb25f321e6a80e984. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QMFMG1467046.