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 0xdb32dc98cfdec2f010d5a3bbe4c8bc864f70bd074668b2dbe1bf837ef9ed111b. 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/2bc836c2-ce5a-4116-8d6f-93db5d7dbb5e.json and https://artists.proofprofile.net/proofs/artist/2bc836c2-ce5a-4116-8d6f-93db5d7dbb5e.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 0xac123a969e114c6c354ee6e4f9e3e8a8561f549d7f0d863dc9397b3cce7809d7. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/CAQ661354004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d1db87257db21c6734c395bfc8875e4d9b2b8dc39a36e2a3f9af394463e10c. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/CAQ661354002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa623e8b669961e862a71fede6443f6b75012b5f95757b95a8e883c0ba1805379. 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/CAQ661354005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496a0c8f3e4770604a1cba8ed4c1046ba9a1e6686586baaa322d6fe18fe5d533. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/CAQ661354010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc21882613113e939c66407fc9133f43b7ca259e710635d8211dd6177daa171f. 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/CABQR1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba78f6760f3246ca66e3e8d8b1a88b7e5cb951107dc17307e4f7199d6a917e6. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/CABQR1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08820584a1bdf997dd98d048137fc4bd0a6d05c4672517aca91acf1c8a1f112. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:58:30Z), 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/CABQR1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0593051a50fb67f0a34397d51458ec0d6bc8e4be5d82a914e4b059f62f87fcaf. 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/CABQR1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4464bd1bf17a3dec52dd1d6ebc203b1241945bd50c759e24351100d17a64484. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/CABQR1700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b771788ec29c712f582ec03b8f4c6135dd3a7f43af0f1c87d989f33a1015912. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/CABQR1700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c16b1964cc7ba28a7b413b6f9919a0dc56bcc41be0a697a2434c095cc1dec9. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/CABQR2000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df116de01bd25daa562dea4f2aa8ab4fce9e9c048d831358ab03aac962791ef. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/CABQR2000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9d83e5357f0a3211c772c05423e6b15502b7d50b0253b7d05f1902d98d3e68. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:06:58Z), 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/CABQR2000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85060d237d0b82ccfe0f55906a04cbd52322ce67dcb4ec0b6f364868f47555f5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CABQR2000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d8367e64b0d71ec8ca2839f932d7cb7336b5559f86b8d5ef6273a24e9da501. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:18:21Z), 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/CABQR2000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22aae82d21cd90a63ea557fa98cf6b36367abaec1a1242f6ca3228db04cc4159. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:36:52Z), 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/CABQR2000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0193bb6d078547bd9109c072fc750ed78b44316735656b8f3f5d1408e0255d70. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/CABQR2400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e60189cc35cb9a2f65b99ba4baa6dd7b3bd41aa5359979c16c4e44003b440e. 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/CABQR2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c5246c184b061238aa9ca3cf4aeb70cab44cc23c9b389284986656b603799b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CABQR2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd503851c618e5033aeb6ddbcf30ed64e78fadd69f7a5fd4e1d7181be173c71. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:26:47Z), 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/CABQR2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1058d68cfe360385c96e9824f27e078108f08c218e44a54f7affad1aad753645. 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/CABQR2400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa293259ac27db068deedbb27fc44e4bd9a2a465da10de11f3639ba08d181cca1. 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/CABQR2400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe4bf389c78c4b29522aa9f8c1dec3e96525a4d1f491e554462e1a3e62c4cbd. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/CABQR2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c84c5efbde694bc189adbe46c68fc8d1572cd1f66f53b32b027d3dee345d2b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:52:42Z), 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/CABQR2400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3457977ceaf5af41f36b86d82ac7943a9720c740063a57e9b22c06f71b1d66ce. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:22:48Z), 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/CABQR2400039.
Personne ne pourra m'arrêter (La résistance)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710dc92fc9f7dcf1fa327a94cdc901797ea11257a296723162cc6cfc0e613065. 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/CAZB91800008.