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 0x73c217bc32d062e64c9f6a789f839ef26db1b1f5b27a0f3b837dfd972faa1621. 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/ccc89f2f-97e5-4259-8cf4-849841a4459f.json and https://artists.proofprofile.net/proofs/artist/ccc89f2f-97e5-4259-8cf4-849841a4459f.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 0xecf57a52aff769853f86b8734e825539d233fda642a47c47148b8fbce1829902. 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/DEBL61135144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37eb5c3810ce1640cd423579c76da4454a1f4d08f2b81d2aaac36726e26a0220. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEBL61135123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3187f6243199571bcc35e788baa7a9ca97528dcf39242c17e699b0fb17b6f6. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/DEBL61135130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefcc4dae4306356b6cf6197d5e3bf1b8a5e6c5d03a3f02c3fbfaedd4d86dcc1. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/DEBL61135160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b4e9d5dd078ecfee5a4561bc8456aef9f7013705a72e136b59d479aa355691. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/DEBL61254325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7929dcbc2a81e69a0eaa4f4263247b66b7246be819ed9276957d2b028cf195. 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/DEBL61254328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7312349c8d9d17d5e0ff95cfe6571d30a1dfb7b33c99fcf383cee341265bf6eb. 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/DEBL61254333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafd591d6fcf4ddd7a7462ee49731bb0ce426c3ca1b8c71026800927113bff94. 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/DEBL61254335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717083232987d6a7701d845e5add38f3a75ec73a76f3402e91e984b7a90693c6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEBL61254336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936674a81cf9b7ad740aeb3a12c5faef995f7795b40bb0ae5fa6eea36f04c994. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/DEBL61254340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8ac397135761f1ad0b394060d9460b3d3613a5654f44471b4d4c364e18bdba. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/DEBL61254341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4112db5ac828339fffc103fdca544b9a7ec7327c40334458e03573937cbb522a. 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/DEBL61254344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e373aea811c83e30483db1e6a2c785d43ba60ef0dba29396aa7f4784c5aa94. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEBL61254315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a306a78216e8015273f5b6c12827f441a5ba76a5de3e880b4bb1e20eba7475. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEBL61254317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca44deb513b6ccd9deef365caef2f7e6df69cda28b538daea064cf00817120c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEBL61254318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c3b8a5051128105c746ca4a81c19858b3edcd6d507cf5a9f824c29a0f5b477. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DEBL61254319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4779673823aeb8e4381a37c28724ff70c4d3e558e6455e22d218a4d1f7706e50. 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/DEBL61254321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c9e7846f16674135ef49b9d9df266d8bbe4ef5ef66811c2df9043aa0408a82. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/DEBL61254322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0ac52290d866f2bc3c08eae622ca2732aff38241803b3fcf04bbdf0d31024b. 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/DEBL61254323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80540aa9805342ff20c8e46b7900985ac8df311765059ddf084fa649cd7121ec. 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/GBLFP2433651.
Coffee House Rhythms Vol. 6 (Instrumental)
Coffee House Avant Garde Jazz Improvised Evenings (Instrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc037186526a0caa3149a94c0e8ac60883f3723ae5509f30b9971189943fa41d0. 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/ARQIW2406474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331a1362f607d7c5a8315a8cb1d4eaccf189530fbf9c520f048565c965efeb82. 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/ARQIW2406475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa0f681a150d6780494324ac025a9cdfca42b373791fca11df4bf86af2fbcff. 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/ARQIW2406476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691593298dd74fbb2be80a2eef3f6eaf5b80c1206cc09b8411a9b6b063fdc8cb. 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/ARQIW2406478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1b035abe8f95098a3bf846d21daf3aa39d809fe9e7382131441eb1531a0acd. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ARQIW2405392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61486792ceff882c70f7bed45cd64d6a9e9a2b172ea2651172bf2d8707b64496. 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/ARQIW2409754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6720849431349aaca5e9478eec157f078f7051299a07ed44749421f7a7dcae06. 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/ARQIW2409756.