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 0xf1a994d92e17c3e39c113154749cdc000d7a10fd8fe94da03ae02946ea3d8002. 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/664c4d80-a1ad-402a-8c73-0367f0fa1200.json and https://artists.proofprofile.net/proofs/artist/664c4d80-a1ad-402a-8c73-0367f0fa1200.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 0x4770ed75a5be272342237552c2d8a8fd4584e1b1d17df0d114fd4f0c581625bd. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/PTUM71200238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61926232999d9df8963a074fb080fdcecaed8abf62d3831ddadd2f9c1bd97d3. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/PTUM71200242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a783fdb97c724d544b60f2cc65a5038536ee9be7d205425164e7551a5853983. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/PTUM71300681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87006ba1d7dd284bbe209ee3039f89537ed54f93b498393aa740cca37034ff2b. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/PTUM71300687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca28cf99b072a6c829b441dfb8d38f4eb74c3589ba89e012e6432e01819e6b4. Chain 2 (Bitcoin): anchored in block 959147 (2026-07-22T15:43:44Z), 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/PTUM71400420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c1ae6521922bf5095a981f40034c4de7885769083d655ef4de92aa2e4b4cdd. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/PTUM71400422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a74111a8895dc4738b2f1d4225a9710cad83bf744746b19e984d42f266ff47b. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/PTUM71400424.
As Histórias Da Xana Toc Toc No Seu Trolipop
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadef73ebcb60a3aa912633ed9582623dd1886758034030b9668a3072acb2f488. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/PTUM71700055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04eb1b7252b1146dfb87f9e38ffd0dc82e51caee9a055d7544aab8f768fcd048. 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/PTUM71700056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18d5fdbb08ff3a6234da8d195e2e99e8bdb8ac1073978a107694c9bf79f707b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/PTUM71700057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a42b1248a8c722ffd8d129d57880dcf4b5e17996d495fc819357de120d3097. 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/PTUM71700059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5283a4c1e8d34fa52c78ccd120a80c3135990310a11a1055a7a32f845f02d57d. 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/PTUM71700060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34259e56169e3e672fda8fac4791beb24f991221e479e2ff1cba3b10aa3e5b29. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/PTUM71900116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754b15eea97718145b8768cd1d4673939986965750b1306708e242ccb1e06c0d. 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/PTUM71900117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79dd2144dc51833aa66f7d8ee32c0d6976e4f808853b9ee7890d4e9b91718d8c. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/PTUM71900114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde8fe57be24a2fb6e1bd1026178d2abe1d9e51ce3bcd557acea29ab3a5595c8. 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/PTUM71900111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8072773dfb81f402421a58eda5fc331ddc27faef7ea32c5b9bb78078d6d1c1. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/PTUM71900112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05462883ffd9091c93a8fba18c5f9c6734a591125ed26fba002294350e9981f3. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/PTUM71400419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1ac76b2be31ac11c0a3e21cf98476ec07ea49a01b97a6255c0ed576b26bdf1. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/PTUM71400418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf765f3511d3e7523c250ebe725aeb07be19669e622d8a775aa44508fcf63055b. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/PTUM71700051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2962e6a34d094166a7ec03678bc5a04e30f0281ff8c7661480adb0ad122c52ad. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/PTUM71200240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50e5099dd808bad9ce9dab5488d681065eeb99ac85719d16ca22089523611a4. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/PTUM71400423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4c864422559376cff3d119bc26a60332bd8c108caf3e8ae8826a3c35cd18c2. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/PTUM71300690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68a6822b9899b2519a6a4b717a41874f0f458023107d099a9b625677c06f579. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/PTUM71700054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7316fb6f9dd4450704c1ac7eb04adf6321aac9195a32d04770e007be3a89208e. 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/PTUM71400427.