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 0x0537a297a833130ef5a3a09109d5c0bc03d2adcf15feece15214b4e8c81b9728. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/10459c4b-78f8-4c5f-bdfd-5024d6254599.json and https://artists.proofprofile.net/proofs/artist/10459c4b-78f8-4c5f-bdfd-5024d6254599.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Smooth Operateur (Quand Il n'est Pas La)
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 0x0d4b16c30cd07cbf8db4fc3606d499652d13bd4a9629cd65d13b71ba9f2d3bca. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/TCAGN2226306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6a362dc85951c4614fddea81b74393e0962ab603b01ceb952ae34eee0cc0d6. 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/TCAGN2226330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd527b9ee46144bba7de333fe27c2c2b0e21d55a18b39196e1c5c15403a9800af. 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/TCAGN2226339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a00bd55dbdeb7598fdbd70dce1ab1c2d33fb47d8945e1a890b27b6b024273c1. 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/TCAGN2226351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaaa1a24e83faf4ad468d437786a2e56ba75ae7a4290971ac2f9627f618cfe24. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCAGN2226357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c2e49f9d3bcd79ad0bf1e2d80ad6a0ec9b7d1f1f1d8fc32e23603b152e1314. 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/TCAGN2226373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a17c6e511cedc340e03f3d2228addfe7c1492ad0b7096c5d1b9072ef9053a1. 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/TCAGN2226382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcafddadb20ac840b8681f60a888c505885a907933fb000b5a02e16cb02e47e54. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/TCAGN2226394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f00a66b4ac5f6df8338867bf8079849f84ed6e8c06a57aa84004f892b03f65. 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/TCAGN2226404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f7c29f6110b471842ac18be3e60b5e7c06bb8e9b879abfcce7fda1682ed17b. 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/TCAGN2226406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeaf616fd1610edd74cf12dde48861c1ff3f01c6fb0d1a1b48671f337a7a41ac. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TCAGN2226416.
Baguenaude D'un Negre Libre (En Cartier Bagatelle)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf790f90cac9a5aa6ce721a927fd6cca84fbb1dbcb5c3f300cac988e61f045fea. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/TCAGN2226420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4712427dec71f65437f753156a8fc89c9f52d64571e52ef6828abd4b4c87235c. 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/TCAGN2226490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e453791d2ec75764b4ccd2bf012bdd493ad64f3904ef01d9efbb2a21a207804. 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/TCAGN2226497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccddb5e86288a4ba2c7fb22bbddd597822c18f107b990fb734c4b340c8ed07a. 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/TCAGN2226505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a898072f9ff63836a30da24115c3ce7db53a8919418194953fa243ac10f332. 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/TCAGN2226511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6060b9db96ec2b4373de97e3ffdedf6c7a88438ec638f76d323f40c63436acd. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/TCAGN2226514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07cb70759937529856fbe94895c06deca8e40f5d557a2481abcd587ba60eb55. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/TCAGN2226521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e25afa92bfb12a9b81bb99cc1b7ab70f8739f3816782cf86d0e43a84ad2aaea. 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/TCAGN2226527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e7b198f66aeaf5a0f007ced91acfaae9e94181746abad630a4058abc3c61b0. 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/TCAGN2226539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef91d5ab2fe69410a551f18b02e326e8582034f9aab9549beb608cd8d02b66ea. 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/TCAGN2226545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464cceefd8306d6017fe4c59f1573e710c4a64d6d7864677b39f792718739753. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TCAGN2226549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506b4139febb6fc9ae243f90b6d041910e41420ae3ba910ce0ff77bfb3751cc6. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/TCAGN2226551.
Dennis Woodruff Jr (Balatch Edition) [Bonus]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1bcfcf571964749600a4f0469c2bf9d14269893a39808ce0209eb0d8d45630. 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/TCAGN2226563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a09ab6683b6726f67b26566febbc294c9dbb2dbc7cae71e648e9927089e0dd8. 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/FR9W12334206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa523fcdf408ec04606ce03da1e38d26cdf693f107dcb450fe351cdb7cfabde76. 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/FR6P12000680.