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 0xa6a49920b6c3ef3bb7c714c1b154c2a6ec49f4119054e46d507bd1327229538a. 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/e39b5ddf-6513-43cf-b33d-f3e9538337a6.json and https://artists.proofprofile.net/proofs/artist/e39b5ddf-6513-43cf-b33d-f3e9538337a6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vivianity - The Favourite Song Collection
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 0x78b2763ac7c40b78ad29f2f4cd40b834ce9f7ea74cd650f879f789aba12e3dda. 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/SEXGS1600107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed10df5364a88e1e4dd5ecca93c944b4f5a462c91f3e238a13432c72ba520b3. 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/SEBAA2101501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9790a27b436519e698bab9acc1cd6c0fc3e2483707a257e6e74601a32a9519. 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/SEBAA2101502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97ea7b6251d84d4efa029681d8016a33193f25f4ae8bb25df21ddf6e2d79e8e. 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/SEBAA2101503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ea77d368d25ba66eb3e555e3dba2e7861c5f29db0a5a16bbba865a426925dd. 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/SEBAA2101504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4729e191e34333d3277e25eaec11a6fb03689bce920e1ef191afe5e63789d84. 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/SEBAA2101505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35a35f40bb3684b77f81ee5f9dd79d9961b13bf37f51e43aadd123e7f6f0107. 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/SEBAA2101506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed04c6deb40e202c2d4278842f8dd589898c21b4d4527d97c8121451307c7c68. 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/SEBAA2101507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ec797e5a5db179f4ca88a736fe2d47657b222bc0a09e6e10cb29b4c8b1c4a3. 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/SEBAA2101508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa130698337c927548c9d4f8601ce706e527f160bea99161e318b1e7615a078fe. 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/SEBAA2101509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1e8e3a861de287996cad1c90827495ab71fc0384664ca4fc65a1edc4787034. 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/SEBAA2101510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8935a93eb7251e6c5aa6dd8ba6048bed467d2cbb6878f2ef085e81b7f4309567. 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/SEBAA2101511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d33a54e3a95a486d25849d9f303cda8cffd29d35bab60b58594ff37beef64f. 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/SEBAA2101512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34b43e4b366b48283449bb189ce9f80e3432dac2fc3c5992a714815109a5978. 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/SEBAA1301104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6bec4e796923cd494f4772af840e4e9ef15670d4559488e9fb476e9a85c2a5. 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/SEBAA1301108.