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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe100d0968760cc3a4cf6a65ac7e9c55f3d3986cdc5f83d45f7dccb7043be26bd. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2830c1f-6544-4298-a1f6-4fa15fcf37a1.json and https://artists.proofprofile.net/proofs/artist/d2830c1f-6544-4298-a1f6-4fa15fcf37a1.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c916beb2027404778b177bdb148e5acce6c4c84bf2f60c7b2bea2cb14468cc6. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/TCAHX2454812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9474a54bf4f76f0b01da5c19d12590341b59471d2b342413b289db5ce4c287. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAHX2487692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d7a4c0b7bdee456e75f4fd5ed70b011f1f4276f72be31e3c116b52ccb62145. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAHY2408159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8db2fed58b516c9c5f5164f4c5df811c3e392489370bbc356cf0ea23c0702ee. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAHY2459099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4bd5d6586f801ad62ba1b4f0923792a22a3f6777d9227828f5689faf03a3a5. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAHY2478450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849478c848d15ebac5faaec169a0f06e2de3fbb292d251493f6bcdc615eaaa50. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/TCAHY2478457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde711ad07d18958224ee9a37f554147147ab061c76400e044fcbcdf742174fd. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAHY2478461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2066f5efa162bdb865c1af67317481a1929e123ab94ee31d6feb640a17e202f7. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:31:36Z), 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/TCAHY2478479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13efa460d9beee018dd373be25e9a181c08f9cc339dd3e9c58b86ecab8512ec. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:49:16Z), 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/TCAHY2478485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446f9f03680388410bbb04e2b88f729b48ee5558e90c3582d88a97a83f9d241f. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:16:20Z), 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/TCAHY2478504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b3fd461523e2ebc2abe45148c945d94317fd1e52207cbf0af83656f44fa235. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/TCAHY2495479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9deb54505a59a0d563dccbf30cc5112fc4f0900cb242b86fdefd01704174ecc. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:34:41Z), 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/TCAHZ2429728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7411c267cec65e4390343d5ed4fdfdf142f942da20b3f23bee50d5e01bedc82d. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAHZ2462113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce4ff6fa47482bc128a228d91f2e5cfc958671b0010bc432178c6807b3ee184. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/TCAHZ2491481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a43043fbd778ec4feb5239d9bbfd46cdba8851abb9fec8865eae9664c28cdd. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAIA2426883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d21f45a462853a5677d1b6dac49a417c332cbf058d7db59753a7da8950f3a2. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:10:54Z), 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/TCAIA2444394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cb16344b0bf3feb22a1cb08bab19c235228da817d87c776c8589dbb37cd91a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TCAIA2461931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361f34b8182ae14df023d40d4e094c30b71636a70c99f41cd44f64be554ee1af. 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/TCAIB2466707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52843a373d5adf43afa5acb181a7c71d8a196d6432490446fcfeb6c3f7c993a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAIC2430149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ceababb39532b1823ecbd3b5dff95282a5f5616cafb8744b6825364214897d6. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:21:50Z), 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/TCAID2407359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe420507372f90bba35399c34056d34fca24b171e0a9c25888fa8acc0a1ab7ca8. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAIF2416940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c088b111bd896ab9af38728424080ca43920b5359e53982fe62288f75365d5. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:51:28Z), 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/TCAIH2461445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9f794394e7c9496df4cecbc8306b57053c55d86094932a016d0bdff1ec90a7. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:40:16Z), 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/TCAIP2454680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3307efae38f5b3b01483df5337bcb4c38f99f3368152e620dc00ce74a62f878. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/TCAIR2488797.