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 0x9189d303ae42441f21d8cda0815465baf7d6bbf38cff94487dc49b06a9445aff. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8237d60-a0fb-472c-85f3-c1691ee269ab.json and https://artists.proofprofile.net/proofs/artist/f8237d60-a0fb-472c-85f3-c1691ee269ab.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nothing But... Soulful House Essentials, Vol. 25
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 0x994572315912801b7dda153c13296dab12cfc7ee665f444c79839a3d8cabe96a. 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/QZTRX2494322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b258a735e6c176dec74fa64c56285933c9f9025d654b83febce1d6c944ac92. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZTRX2495025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4906208a1b6a2ae89c04de42b433a237368cdb3890a477a8d15b217ceceae3. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZTRX2495062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd0909de87cb9c9702fc076d1230d81d102479468d9319045d7f8383c9dc682. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBWUL2478471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4a21240c263f5d96a24ac2e7faecc570e45b940205db0d96db4d92ab917fff. 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/GBCPZ2422915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbd721cbb97c9aa8eb11617a7acb884975a9b1e119a8bcd202573d1392d8764. 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/QZZ8B2317808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c78307202e4893a92d78c181fde43a8143a4437a738631651f79f52f68fec0. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZTV32327930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ece4599901433ca7b0a1767a6d4b985b174133d0b4fc3ff45a956b894be5887. 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/QZTV32327934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf362082057f477ef7d874b832afb8461f6d00b47dd0c40479675d01260c16bd8. 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/QZTV32327938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd900776bb76a7ab08098154584304f085ba3053a56c1b43f452b4dc5194a7ffb. 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/QZWDD2420789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f63d783f061d40e8d0ea11102ec2c503f1216d18a8dfca731554a6657bf2c90. 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/QZWDD2420803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3745239d16edc53f352af801c34a6c30ea3399cf1988ca738708cc1825076b. 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/QZWDD2420819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd1032124bf3124537703349a67e0a8b3555f53155f418cd2f4ae24430a5a12. 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/QZWDD2420825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0526e465df35555a6aee32f0ce1163f4b45b8723fe2ce28c4a475533d8213803. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZWDD2420827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89487a29247c7df24496f1d34ca785adb94e4e336be7532f9060138aa7d875fd. 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/QZWDD2420839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db84c1ebe2608dd340220bdaff877daf2febee1fe6f1ea7dd9b3fcc4a3712ac. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZWDD2420840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b984181413f1a4eaf5878591a43eb3153e9ac18f27df6c8fd8b63191cccc68e. 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/QZWDD2420878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2096ea9508a3e86a3c5b07c30405eb3617f553c3d6708df560523da318bbeb1. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZWDD2420883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69809b8fcd9767a69a476ad0d79efc4c7af705b7f82d7e99f9e60fa44d170ffe. 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/QZWDD2420885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25dbded533c7c2d816dbe46cef1ecf0104897948712a74e7dd03faa24d639f89. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZWDD2420898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba96a0ce8f8df201ad2c77b1ffe1e5515f9eb77aa4e392e02cdafe62440055e5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBKQU2342334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c78243cf779e2034cd517ae973c143ad234d3efe5aa45f0663ccc39c97a9e4. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBKQU2335856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb47cbb72b9e2dce24d67118308403a3e8817eb429b0944ede81db7e0f0cf860. 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/QZTH92315356.