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 0x9a7a08ead15a9cf5d1424f06d5bf2c6288d4251b77029e00edb8f1f32d264a02. 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/982224ad-5dac-4d18-bcb3-b625e5bdfd07.json and https://artists.proofprofile.net/proofs/artist/982224ad-5dac-4d18-bcb3-b625e5bdfd07.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 0xf910f663f675623864788f486bdb4ef7904d0595496930221bb8f189364364a0. 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/QZCE61887531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf22130a7d469666695f8e873002839403b0dd8a2fe9afff48bdf9395d3891ee. 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/QZCE61887532.
If I'm Gone Tomorrow (It's Because of Aliens)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7ba236d43c1dbd3769d1cade20cf5290c0761bc9e9aaba56b8b730c8c1fc81. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:00:53Z), 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/QZBXN1800901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55717a6d0b7a99c38cc5aa554796f12f15bfe76ede15547e1dfab4bf6f594b1d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZBXN1800903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f936406ff9c60e4158c7562674ccc22d2fe600ca4cf5955d5fbef384e661ce6. 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/QZBXN1801201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da4d32fc7462da4ac63ea6819cc07020ea4a30bb99106eddf95fda1faad0766. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:23:31Z), 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/QMBZ92196797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22abdfe41666ab1af06d65825c98a9ca8e64f3fcb5184fa4bdf7d839c55d883. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:08:45Z), 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/QMFME2154042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89dcf901a0ffb9844d019bf519d2567d99e53106c30e654b1489771f0d8a013d. 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/QM6P42178438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ff589e86f8baacabe92cbffc271ecd2d06d26c95914e52e30a358c82a9f97b. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QMFME2154044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c35873236d960ffabcf5fbc7fda969ef21d27858abf695cd889411b073e16e6. 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/QMFME2154039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19fe108146c615b8c39803c7f921e9681ab2c176ff2fdfd2a3ef82db35eb8a4. 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/QM4TX2092206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb35477582dc21a9be59f5081a072310177ca30f40eb1ade9da836b76408691. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QMFME2154046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9f190f3b25848a96b402e774f0fb3e2e8037beb19631a9173eae96a45383f8. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QM6N21996917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b1a452b2688364a5c0236386ab6c95a7b0c008e62bdbd576d56ebf1aadb74b. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QMFME2154048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897de8fba133b2b76ade02926a75cdc1fde336b09c37bf3205b4b2f123f2d883. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QMFME2154050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38697d11749d5bdc59e3f3937a99dc6c5fa5d89e194344243cd74a7c9150722. 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/QM4TX2204803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18bd90d2e675d24147b37657e08ae4770b9a2f9a67abe039b216cb535759bd10. 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/QMDA62261755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8066194ecb0eed92f57932ef23af702dda5f87548ae421bc03852c9c48b52e77. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QM6P42363438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8ed3936189e1560dcfbf7e65d7ce1edfc8ad0d4d4b7fadbec4e011066aca1c. 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/QM6P42363446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a83a75db30139a29defd24e169472fa7acfbed72dc159035a6952babd9742c. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZWV32499315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b0ba75bdefab349d8f058d6fbd51aae632f96354c128aa39654c826c642f4d. 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/QZ5FN2277480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b0ba75bdefab349d8f058d6fbd51aae632f96354c128aa39654c826c642f4d. 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/QZ5FN2277480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd902463bc33ac4799cd9bfd1309cf2ff23b10e7fc9f7480250776805d79f80ca. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZC5P1800154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8f23dcca5f7f0c627afdc981b0dab722c13dbe8e019ffe81c6c4a164bae9e8. 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/GBCFB2300221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e027b5d856a1b3beccd7a88a74eb2eba1c2c55cae48c8ddf130d54f6881dba6. 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/USLZJ2418648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b0ad72eebdb86010d13a0e47ed6d7c1db353c7fb5ba55de821fae8326dead7. 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/GBCFB2300872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8f23dcca5f7f0c627afdc981b0dab722c13dbe8e019ffe81c6c4a164bae9e8. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/GBCFB2300221.
Like Someone I Know: A Celebration of Margo Guryan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20f2cf658cf86c100a7c5edb6512d5dd30639bc2724cf6fdb05e3acdd605735. 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/USSUB2464405.