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 0x550de144deb36b95e45ff433e0049c00627ce008177632514ae18146cad6bb00. 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/04832f32-f40d-4dc7-b3d6-720a4b109edf.json and https://artists.proofprofile.net/proofs/artist/04832f32-f40d-4dc7-b3d6-720a4b109edf.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 0x3557b01f004cb0430e54e12e8081b265d68cce870a701e5c922c93d47c14f2e4. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QZDA61848471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f666a2d241e65bcf004eed298cd0ec8f8c5c86585b263034a2ef4e2d374be2c. 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/QZDA71869066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71d5236e10978436e1730364c3c1b9d5b60f780d1fe13df7700870c791bde90. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZDA71869067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7025fe47db1d305abd965cac2e3a323161fa1fe26a9cccf236430d4050662bc6. 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/QZDA71869068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e9959d167e262837dd557a600513f2b1df18164647d254522a36cedd4cd486. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/QZFZ72090115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc790f8142f881387a8cb67b244c03ca9b657d93394274f7a8b97926fafbe6618. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/ES46E2200061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1effb422acd39dd820292662009c033b822709a76a9525089042a511bb8dd67. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ES46E2200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fadaf10a05416a3fac2aea47d9bd17985b471548862e435613036fc790d784. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USHM22243674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900e2755be35f414e07526fe1614e6c2f393d3fa425ac80f98b8bf2032f01736. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/USHM22243676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27d02dffd69a1a2df61dc143f23188cc6fe4d64198a74bd197680415b3490b3. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/USHM22243679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11266b173d3d4c34f219bfcfc48001ace730ab6c0e3795c21f2f1537ace2daf. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZFZ42307808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626a5da33cb52923cebc379ed331134fd8327bb7c8034fcc22a8f85b6b46a2ec. 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/QZFYZ2326556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe111fddbd9ff562a3d011c6cfca98e8e23496b3cfbc1b5ed6f2bdb16d97d573f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZTBA2433354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b78bab077d6034bd2a4a055f84644395f20c41cec05d250875403ce549c788. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZZ7P2422984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34fbb4d216467b59143763964077bb95c392d62f0c4d1643c3379732246cb74. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ7P2422985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38eb08fca5b8b3fef4a30d0c777cce1cd77681fbf495e2b2dd958ce9694f81b. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZZ7P2422986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45cffd68ef2a6ade6aebe3cc1290fc73d4943a1c22338f8d1d60cdeee5118fd. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZZ7P2422987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1118fccc2fd9c175490c3f48541c533fb129e4d15aa29bb19ccec3a111bc84be. Chain 2 (Bitcoin): anchored in block 958635 (2026-07-19T00:58:42Z), 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/QZZ7P2422988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9495207fad79e6c91950ae18eb42f8bf93e08e29867e6b4af9396848fa42f6. 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/QZZ7P2422989.
Indie/Indie-Folk Compilation - Spring 2023
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339c0e8d7ad21786595636430ad4e9325a267eb721e8f443c23899938517bbbc. 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/QZFZ42307807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7df07757e01152c038142ca58e3a1db80d94ada66b889da2988811e0ff82e4. 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/QZW9L2353217.
Best Indie Folk of 2023, Vol. 2 (Indie Folk Central)