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 0xf9fe50ed57332c30f31b96547933e85e9bd0cf9282999261e2d16e2029b00074. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3ef57d4-12c5-42af-ac2a-5b28822e4593.json and https://artists.proofprofile.net/proofs/artist/b3ef57d4-12c5-42af-ac2a-5b28822e4593.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Poem, Ballader Och Lite Blues - Återbesöket
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 0xa7345e9c2dd57c69d375f5e3707411b0c9fe44f310bb493ff0f4c759db02acb0. 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/SEACA0701201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35589e802bb57b3a403a85f1e54241dfbd9699f0d683ffd040f749d591ea5a75. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/SEACA0701218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d573c6eaf6b504927b587f4a042d3ee7a3afcbd8ccafbf00df23bcf22ea8f9. 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/SEACA0701202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac555b49846d25df00524b6d62533964f338d8c96f4357bf684d617a4d66f42. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/SEACA0701219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b1de686b42379044a7e3ae0dff1a4ee0b9d9a69ff09b441dcd5fb9e5369252. 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/SEACA0701205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797e8bcb397dacf623d21ad60cf8ccd562004a6dd019eccef1149e8f5d5726da. 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/SEACA0701211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d550a679435b9a0eb52995bf04044d5ef742a723b167c5b5d804a1afed894d2. 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/SEACA0701213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4829e6a7cc0cfe538bdca7b7f20bba92d1f3efe0ce6885acaa31c57740f2b7. 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/SEACA0701231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a22c6b9d852282d8f0ce267e46b90cccf322896faec77adea6a7436bc2418e6. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/SEACA0701216.
Ricardo et la peinture (Original Motion Picture Soundtrack)
The Raft (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ecdeefb04a076ec7e6d8254999caa4a8e2832db321d39d2a449330654e70b50. 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/USQY51722453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4255c9cd79fdcdbd4adcbd70f557cddb62d0910c19f33d900d2a0c6d305272b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/SEWQN1100402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8574c6bc6766bd039a887d1e45ac82276850a6d7f3b31881f34dbd37c4a111. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/SEWQN1100403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3483e7bccf5b65a43adf3a7c1fdd9be202171f746e93a62fd8bbc2cf4655715b. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/SEWQN1100405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1fdf20ebbd2ecf72a101d8285234d14cd20fc6409d93e76bdc01880ea0b2a7. 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/SEWQN0700402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5110dfd0d225968021ebedd1b58f4e8e742d40a474f5f9b89659378fbf02da5a. 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/SEWQN0700408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7e14e7d4c3980ad5499d25b58c99f4d353b8203910a66e9d5755828214ef11. 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/SEWQN0600502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13004d7d6b74bf6c9a90b6dd0bf1001dba8b083192eec5101dfd02af3693efa3. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/SEWAZ0400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e47735a61fec5b8cb244438dc806cca7fbd52dd8629a205e9580c7df8f1a73. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/NOX9X3161804.
The First Three Notes of the Minor Scale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7fd7efe2d3bac96b0fa81549c24967accc9e757eebbe8c32b8b34b81377d80d. 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/SEWQN0300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf781f3af691ca5d51c2e7635a409c14d5bb620ec61fd84474c3f25d45ebd82d6. 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/SE52H1900402.
The Battle in the Water (Hans Appelqvist Remix)