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 0xd88a074459af4c50fbd0aef5ce56873bd951f33972fd8a4d4c9df80e6308a97a. 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/b4139005-1e8d-4ec6-b7af-068136f394f8.json and https://artists.proofprofile.net/proofs/artist/b4139005-1e8d-4ec6-b7af-068136f394f8.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 0x68b426989ecd911493acad76b34c4672d03c32829e9b33536dd749a0b12a75f4. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GB5P59700081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03cd802db0364ceff84da3804013b4f6166ad30176bc76844d4f5133139cc9b. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/GB5P59700083.
Real hiphop - feat. Earl Sweatshirt, El Cousteau, & MIKE
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecac1f715b18292d1d184fb174e071cf7f9769ec4115d9fcf2ef86c47186a094. 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/GB5952300449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1bc21e9c7f5fbb1b03ebac79435d2f04663c8daef739ebf522842cb469316f. 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/GB5952300444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3892fea050ab94358d8995f226cf2d35abd2f8eda72e8077e012327186fa00. 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/GB5952300445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed656413814101d8090c5dc752ab7903f50dc2daa00e31a53b1923e3f718530. 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/GB5952300446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26669d42c415e48601d8d118f7f6bd4103d10a59e3f67ed9b92407f45dd57922. 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/GB5952300447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8930abe1ddd22245871950fd31e62bd605f71e4d4d3f8ff4887c9b9e276961d3. 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/GB5952300448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecac1f715b18292d1d184fb174e071cf7f9769ec4115d9fcf2ef86c47186a094. 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/GB5952300449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce9ea62ba2117fe4c23c37b11f1c580c0d12b7e632dbfb09015bb75e396237c. 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/QM4TX2444035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5820f63713309e577d4d98cf753de1de9a72777cfab4cec6b27d7e68f2e7084b. 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/QM24S2300551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306d2759c282240f29f2ed2c94d47b5c11a94b3471b64f875d38cc12e377235a. 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/GBBPW2400473.
Mussel Beach (feat. El Cousteau and Niontay)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47905ce575981b1219c9a72c983d3e7dbc79a486c34e481edae07c101005a41a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GB5952300385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a703503043ba02a3a252281b7fd723dfd1b1d530a2db3bcfd4a684e62db88d1. 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/QM24S2404421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe435f1e0433290f2d10d5e25d50266aa7b1159b54a28d71210865d478e175726. 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/USUYG1557008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989db4a5994471074f545448cba4f6380fe7dd94418f4b890fdac9f14b123d19. 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/QZFYY2231286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940c946452c1d5871d5962a4f5488e44e9b887d25d3f6e6c64bcd7d338cde0e5. 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/GBBPW2401363.