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 0x8203a6306970083b302eca8a552f58a3021904f78c01db1452071196c421818e. Chain 2 (Bitcoin): anchored in block 953783 (2026-06-15T12:24:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d77769f5-6d7b-43a1-ad2b-747ac1b051d6.json and https://artists.proofprofile.net/proofs/artist/d77769f5-6d7b-43a1-ad2b-747ac1b051d6.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 0x16d0b307304b670658aef6c09a498a6c7a412c44ef7506f07698d633eeac12f2. 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/GBEUE0700643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe822eec644dddb9345db64128c835213dabf0042264580648ba571f4c1bf846b. 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/GBEUE0700644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15d3975d7266e492dd3e282eaf73336943478bcf5f2d30ff02b4bd497315af6. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GBEUE0700645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea476376ce28bfe9fc7fdb2b09234b7ddb8f47f2a80edc5aef7dd08e86e3db1. 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/GBEUE0700646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26593d67f3fce40d8fc6aa279b6595b92f98b17fb458f5de020dc941c2183e3f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBEUE0700647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3827036a475ef234d05bcc5337b7e68b4175e2876a5135417a9d1860854a07b1. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBEUE0700648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91294b18880d2b399e182610503b8c4114cf39caa47be32ad333884ef4c46c9d. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GBEUE0700649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b027a9e93f5886ea33ecb787a7ed39842b16bfe4c14b0d5a851261a4ff974f5. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBEUE0700650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9525203ed12d2926fdf1357920d1d0863e371af599031fce418baf2ef53edfb. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBEUE0700651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1025e4e2ee089d99d8293701463ad9ecbd1f27392826df3f00f889ebb39705f. 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/GBEUE0700652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa857a5ea8f92c40aa8075fda901e523e8e5b559853ed16f0240970fb6df6cab2. 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/GBEUE0700653.
Saint-Germain-des-Prés Café - The Best Of
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca2dbeaf94c59a194fcb35a4ef6e80b3e6c96e18018de6af80514475fcdd9fc. 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/GBEUE0700655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707e0efaf1722a6f0a5706e78686f30781db3aa6f654e651b980d04c0ed973ee. 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/GBEUE0700656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a2a95620613d0768f217bdde14c8d57c3178a217a7ad35041bd2744e324f61. 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/GBEUE0700672.