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 0xd663eca2405aec51f176460d9bc4c3ee77621796fd5dbc08a77d5281200b0aa5. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8a9b7f9-f14d-4272-81a4-e53fd6985f07.json and https://artists.proofprofile.net/proofs/artist/a8a9b7f9-f14d-4272-81a4-e53fd6985f07.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 0x56c69624303066444ab287742588ba57e066b78325b946e5967def7a432a3d4a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBLFP2389545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbb900024d65e4a2c8c978478d4695a968b8082bdda8b689094534daf31ab2e. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/GBMA22336253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd597711e81cfe3212f2eb69b1da23059f352337e595847bcf76e33bb59eebf5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GX3Q92429090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec88f45115f47718c19ec02145f83fb70af5191d9be10970169cc6e354c9db98. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/UKXN22550797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816376cd4d52087c499da998ebb96f0b402358c4d85037ce3dc0e1fc22c0bddb. 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/UKXN22550798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1af3098f6e545eeb64ddbfacaa900373588a6909f670b635ac16afeaaa5e52. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:39:51Z), 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/GBLFP2572749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe627d27453bfd3217f9204c5da0a030bbe60ddbda9fdfb4a49c73c99a72abb. 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/GBLFP2572750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f3fedd84121d5a38bfefa6a2082fd9ca13862c8545e525c8cad9501aa5570c. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/GBLFP2572751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4b0787beadfecd3e39292327b190388dab30e8dc5413fcc13a64414465655e. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GBLFP2572753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51db10762ef9274131d39068d02abb830f2965739337a9b977c1a6e777c2b7af. 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/GBLFP2572761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f85eb86b9b17c7a8f957cca42f28deec39e866fa5b4c9c9584857027787f37c. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/GBLFP2572756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8ab422590cfbfd20483946fd84bc73aa656add02d025ddc6697c5b082fd4bb. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:02:19Z), 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/GBLFP2572758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a7bbd35eef3e8326daffb07d370d00c36c5199e4ae4c6b978f6fca1bf86492. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GBLFP2572762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37060b1a24b1ab708a57d2e117e88f45093ab3d9d3e70354ff6e3baa110f2c66. 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/UKXN22368079.
The Municipality of Gqomu Heal Us Deluxe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146b8b69d296e4c36557bb8ec562fda8e05d32c6ef62d1ef591191925fdd56e4. 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/GX53U2451726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85aa95211053d5c35735f813433f7429ab33ea6ea0c4bcdd00b54d76630c9830. 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/UKXN22368081.
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