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 0x9af86b8e7431e66857bfa983d13c87df77a85ee616b4e15d2fe4c04235a162eb. Chain 2 (Bitcoin): anchored in block 953782 (2026-06-15T12:13:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d45641f1-754e-43cc-964c-a9f92f8e40e3.json and https://artists.proofprofile.net/proofs/artist/d45641f1-754e-43cc-964c-a9f92f8e40e3.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 0x3158b3cbe0c39613c0fbb2cad1f52ecd1a727dfc8af8eb73742fd3c781629f85. 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/GBMCZ0600505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb85f1686e16d74650aa1ed5c222093d5a9f95b0ccab70f14bcb7a7459b14e2b. 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/GBMCZ0600506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc881ff2f659c0a35567de41649cdcf1ba7179e2c629f218c079ffe0d435a8b7. 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/GBMCZ0600507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cab6d4d56ebd2ab285c3cfbdda55bcc40b74a49450f785c23aa528532487f3. 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/GBMCZ0600508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940de1085dbacc67cb14b180af63400b1c3e91ac2063070083baa32e715f5edb. 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/GBMCZ0600510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049e07af18c8acf841b52143db9e632a37f49c02d8e1d6ebf954ee5acad6f995. 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/GBMCZ0600512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6959139af68cb278002367e4ab65158752806723d03564a1d233006b5311776. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBMCZ0600514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec7c2aa5c5f9317267bd2db9c926f67a02ed36adf16100b38b4c5031b520e5f. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBMCZ0600509.
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 0x3e82346efb0d49e56919d6f291f394537d2239d4a038f8f0689df3bc7485ab7c. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/GBMCZ0600511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf378cabab01f091330d2bae275cb67a7f1ea400469530cc37167e60139ca101. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBMCZ0600513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f794353674918e064312531981c54c4ecf4743696c48706a6e07e05900e3dee. 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/GBHVP0900176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf2eb9c1194f9224d76bb6a6b6488e048f18b60b6facef25d07670b173b993b. 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/GBHVP0900177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9877de799cac8bb5282b21a33fc636de192e602f309153ff9c3a522d015c1e3f. 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/GBHVP0900178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58265f2a56c171f347bd082d6aec1d5c9ab0b07d9e16294ee6ac914d55e53fdd. 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/GBHVP0900180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72296db517a4e2ce85ec43a9e45c4fa6d33dbe8e5374be35337cac6d01f9b1de. 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/GBHVP0900181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38de461a95af4c13267e166daa1721149ebb7580d61b0f2e8e017e248c121ce8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBHVP0900183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63df4e2eaea3e1e282be0c409a22f702eb1b61503e3377a24cc0ff0144a82aa9. 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/GBHVP0900185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fbca1e5a1e843bdef1fdf11d71240e321efbc84c07a229c4120b7b8dd50f5b. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/GBHVP0900179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa3024b5678de9580ab9c65b5d708d80f3e8c82db4fe1accfe4578ad739514e. 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/GBHVP0900182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf18a824030480c6b6ef769b107c193c74d4ab06a935556962b1cb3ef24ebe30. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBHVP0900184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f794086522e98cce90ad340c05fb2e1b4337b75ec2676f27b28fe70c26f90f8. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBHVP0900186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a330b399c4dcd3afec03802bdceed18ab9d6e642ef7c867107b45bf5a3bd97. 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/GBMCZ0600517.