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 0x32349f6eb23e49cfb1ba0f6f3427ea8025d915c1661a5c00986334bf0c396b10. 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/12e82d2b-75fb-4a38-b3ad-7516adaac777.json and https://artists.proofprofile.net/proofs/artist/12e82d2b-75fb-4a38-b3ad-7516adaac777.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 0x92e4bacad684cb33f35d2013cdbf8a78eb14aadd921ad1c8918732ac140819e5. 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/QZK6L2349957.
All I Want For Christmas Is You (Marimba)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b045c27c54657c776514bdb7af94d3c23bd927e8dbd05cf753f572984012cd. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/QZWFP2370459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135eed60b5a3d718d7c681ad44f13e3a0beb88eedc13f90a69a902cec6d7b228. 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/QZFZ62475424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e449627a26d87d9a3b2ef00c6425a858657873b0cb6d05f38f5f7ecf51e4cc5. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZES82419879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263279b4b563f175a284440b1d862a6e2ad7a99eb2042210fd528fa7ee5ed0a3. 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/QZES82454342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e449627a26d87d9a3b2ef00c6425a858657873b0cb6d05f38f5f7ecf51e4cc5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZES82419879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02284b4f01f0ca08b63e33a34e0baedb7485909260c600cfb19ad66f68382d19. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZDA82444963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e4bacad684cb33f35d2013cdbf8a78eb14aadd921ad1c8918732ac140819e5. 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/QZK6L2349957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa96bbafd213d4ea8a11d83f48f39e52934770b3df6d6cbfa5ff64559dfd35f5. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:03:51Z), 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/QZPJ32427195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6ca3b8a61d646a4b3988b104b44ae5201f8c83ea6116af776c9fd0e47fc154. 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/QZPJ32437458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54640cac35ecb8241e473e7d65b7d0cbaaad7854081a0eb63ab2085725031476. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:27:20Z), 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/QZPJ32437459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d2374108911722b1a3c31ff403b186c07a7ef54f06f8ef6b67feabdf387dc4. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:01:20Z), 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/QZPJ32437249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4244a20524aa8bcfafdc0c6e2f7e682f81b2dd1f8698cda59a01c423a3f444. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:10:53Z), 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/TCAJD2473773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f350f44feedaf645fd50c4334d0d999cdf322e808d48711dc6311dac0370d09. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZPJ32475434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658a3dc191e259f78dd0410c237633447645aac6c7a07902b6e5f87cef83b486. 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/TCAJZ2564065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9de706e2723195955068591b962117d435639d0ef106134aeae2a8e130a932. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QT65W2523012.