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 0x5e030190b4b89badbc184805be5718848ec763b5631edb686858b10c92b05c56. 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/1b59f188-a0f0-4b18-b242-3c7216fbfbba.json and https://artists.proofprofile.net/proofs/artist/1b59f188-a0f0-4b18-b242-3c7216fbfbba.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 0xd038a7c3dcb91f706df44a9f873250415bcdb408ffafa1a2c4893df8ce65c2ca. 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/FR59R1737322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8904c09ed25f6f3925e0c6b0a70fb1b47bc096c303b537a28126f4deb44ef36a. 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/FR59R1737323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0066a03654c6acdbef43c2c19b15236e6c301f4f903d847d91eccb6ffac1a3. 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/FR59R1737324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397541aa0660fa8da2a888d0629a73d7f6759421a0faee605f71e3a7832a109a. 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/FR59R1737325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fefa0d3354d72d095e55eb28194fe53efae7aee06d6d7d2e5caaad698cea447. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FR59R1737326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575ed6d1fb43ba674e663dd4c8aa2f0fa07e52e99d66f83a12a7cb3e126394cf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR59R1737327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a81747181ea029da11940ce2c7494bd5bfcab2885c12c4748f72869f5aa6e8. 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/FR59R1737328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4906b0bf2482a74a4aae1c06c3f6ab58a6c4c42cafe086b40424861152cb89. 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/FR59R1737329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858c030b7f9ca2889ac018ea26eca4452dd7aa3b0902dc5ce957c7f3c1464af2. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/FR59R1737330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6252debdb986e00e9d0f302f767e4d0ecd5df0ea09a0970bb02108a4da25882b. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FR59R1737331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0046e7e43b5987d8076e443ea49df485b5dc2218aeb7a6478634907a5e7ad6f. 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/FR59R1732946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d8076819c2fc24350e4d307a53ae0835eceb7ba757391ec4bb412424680d9d. 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/FR59R1732947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadd62e4442a6ad93fb785632b91ff5e5f5308e3cbd00fdf29422746154ea3b3. 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/FR59R1732948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b90994c8084ae8ddca5e10da9eee47d2ae9f1585bd8e2353fec782711a7e5ec. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/FR59R1732949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c57e25caa6d631593ded5122fbb10e9ec1c55164093374995d4286209d525a8. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FR59R1732950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75361e8f30c1cc10374c845f2c76ea90df352f12c649f605be6ce3afab5309e7. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/FR59R1732951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b8fb124ba6d0ae5eb312b8cf53d5ccc6e7f21cd46c9458d92bb7253fe491c9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR59R1732952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f2a830d3d17fc7f67da0a12a2dcce1ea62c5f6a05ebac369eb75cc6c6f48b9. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FR59R1732953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7cf61308b3e8da9cb264f0d32b99569de9875bd9aaab96abc1a910d8065bf2. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/FR59R1732954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db1c4d0f5cd22982f2b41b4171ac5802c46ddd59c359f6f98298f55a4eea4ea. 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/FR59R1732955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878d76a92a515127b0d45e6a48524abb76f45bac8ae56f8777dfeadae0d3c959. 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/FR59R1732956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec7c9692900514835452cbcbdd83a70c091d08ade642541b12070af94ab168e. 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/FR59R1732957.