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 0xd899f0b6182490516a445245d1f8f3229743a80fac480cbc8334c069ba687529. 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/33731985-3030-4655-ad49-59d6fb8990da.json and https://artists.proofprofile.net/proofs/artist/33731985-3030-4655-ad49-59d6fb8990da.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 0x1ab5bfc26d3dc8bf6fae56b7132367c738e67c72577314aba75e8a8c0c8c2b33. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DEQ022002313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45b3a7cc8d1c799f0a204f03cdbc97e34c4164cf1e165972937f6e304b42f44. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DEQ022006509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7f893d1fc180f8a349d6f48e7a6220f7c4260d8f04e9b9b0a2ff82c55e42cb. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:35:27Z), 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/DEQ022011695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05280d89eddd9c98bb2e900de388b948bfb7eb4322c351111aaf5a06947be3e3. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DEQ022010861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6a5f5d0301aa2e4132610e4c166e1ddfd907f9b63116a8d5665242e97634cf. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZMEQ2140066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabae632395c29613ba948a5e750d0cad62e3e3df9658bd5c5e413c8a93d33478. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHNC2208175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9341069caabbd2a6e92e6b4d5d0ff4f743ccf8228a30dc299c745e6dcf1ed7e9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZMEM2250273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabae632395c29613ba948a5e750d0cad62e3e3df9658bd5c5e413c8a93d33478. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHNC2208175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3c5b1a46ef25b181c7da2cdd272b2c655356c3fda7a761a33e84a42303fa86. 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/CH7812347100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1f467d3833678302e0a4ea278b698088f5ccc6cbcc9f6a318692a28c006639. 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/CH7812352172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560b784f7da670fd32bfd719264dd9d8386a70793b8abdb46bca6bb77f2b0658. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CH7812355002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c6e31664667ca8a7b39ff0c4f23129aa1ed0c78c8ebf4726bf2fe07182b3fa. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:58:00Z), 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/CH7812401737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1648d95c3bd05069f39671e99ca793551d281abea9aadc72967737087f682c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CH7812414850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda511c2cf8d74409dc2cfa09d9b279c9497e6440b231cda40f85c4592f0430a. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/CH7812424763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f568f84aeeaa3637bef6eaeb782fe7bb8d03246bc85d2a92bc8ce9bf36d76f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CH7812424331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f99c147897bf4d24f4573b34d83ece03f3340591e82f6010181358f86ae9af. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CH7812410683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa387dabdfb8b7733e8a3ccb55f958d18adc1425ddd208c1e33df4462bda173f. 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/CH7812420625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ebe6b8f164f3337cc67f29d84e1e62d0b686b8b3de74169bd3985f700caf92. 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/CH7812425198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eda6afbedfc553ae676fd928d472ff32d3332453c0a90c1fb13a502b0131b0c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CH7812528298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3269d43383e8820da0d3c6081d25ca121afeb7504f1922adf8fb3e6ec7afa06. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CH7812421320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdded2e3beac342de32604d5e70e328145f7af5bac81ace278e1720a68992a224. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CH7812425383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3269d43383e8820da0d3c6081d25ca121afeb7504f1922adf8fb3e6ec7afa06. 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/CH7812421320.
Team Biggie VS. Team Accaoui (Part 2 von 3)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac7de0959614592b79274460f1cdbed066245c3560f91b275fc7e426b2b140e. 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/CH7812423477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f53115b4ab542f82784e0b3e53e88338fb16b25ff73c8e1085db67f2aff7b3. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/CH6542246230.
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